feat: Complete plugin lifecycle management with lazy loading and runtime reload

Major changes:
- Add unload() method to all plugins for proper cleanup (unregister commands/providers/LSP clients, destroy widgets, clear state)
- Implement lazy widget loading via "show" signal across all containers
- Add autoload: false manifest option for manual/conditional plugin loading
- Add Plugins UI with runtime load/unload toggle via Ctrl+Shift+p
- Implement controller unregistration system with proper signal disconnection
- Add new events: UnregisterCommandEvent, GetFilesEvent, GetSourceViewsEvent, TogglePluginsUiEvent
- Fix signal leaks by tracking and disconnecting handlers in widgets (search/replace, LSP manager, tabs, telescope, markdown preview)
- Add Save/Save As to tabs context menu
- Improve search/replace behavior (selection handling, focus management)
- Add telescope file initialization from existing loaded files
- Refactor plugin reload watcher to dynamically add/remove plugins on filesystem changes
- Add new plugins: file_history, extend_source_view_menu, godot_lsp_client
- Fix bug in prettify_json (undefined variable reference

src/libs/controllers/controller_base.py

@@ -3,7 +3,7 @@
 # Lib imports
 
 # Application imports
-from ..singleton_raised import SingletonRaised
+from ..singleton import Singleton
 
 from ..dto.base_event import BaseEvent
 
@@ -17,7 +17,7 @@ class ControllerBaseException(Exception):
 
 
 
-class ControllerBase(SingletonRaised, EmitDispatcher):
+class ControllerBase(Singleton, EmitDispatcher):
     def __init__(self):
         super(ControllerBase, self).__init__()
 
@@ -42,3 +42,6 @@ class ControllerBase(SingletonRaised, EmitDispatcher):
 
     def register_controller(self, name: str, controller):
         self.controller_message_bus.register_controller(name, controller)
+
+    def unregister_controller(self, name: str):
+        self.controller_message_bus.unregister_controller(name)

src/libs/controllers/controller_manager.py

@@ -31,10 +31,11 @@ class ControllerManager(Singleton, dict):
 
 
     def _crete_controller_message_bus(self) -> ControllerMessageBus:
-        controller_message_bus                     = ControllerMessageBus()
-        controller_message_bus.message_to          = self.message_to
-        controller_message_bus.message             = self.message
-        controller_message_bus.register_controller = self.register_controller
+        controller_message_bus                       = ControllerMessageBus()
+        controller_message_bus.message_to            = self.message_to
+        controller_message_bus.message               = self.message
+        controller_message_bus.register_controller   = self.register_controller
+        controller_message_bus.unregister_controller = self.unregister_controller
 
         return controller_message_bus
 
@@ -51,6 +52,17 @@ class ControllerManager(Singleton, dict):
 
         self[name] = controller
 
+    def unregister_controller(self, name: str):
+        if not name:
+            raise ControllerManagerException("Must pass in a 'name'...")
+
+        if not name in self.keys():
+            raise ControllerManagerException(
+                f"Can't find controller registered with name of '{name}'..."
+            )
+
+        self.pop(name, None)
+
     def get_controllers_key_list(self) -> list[str]:
         return self.keys()
 

src/libs/controllers/controller_message_bus.py

@@ -28,3 +28,6 @@ class ControllerMessageBus:
 
     def register_controller(self, name: str, controller):
         raise ControllerMessageBusException("Controller Message Bus 'register_controller' must be overriden by Controller Manager...")
+
+    def unregister_controller(self, name: str):
+        raise ControllerMessageBusException("Controller Message Bus 'unregister_controller' must be overriden by Controller Manager...")

src/libs/dto/code/events/__init__.py

@@ -4,18 +4,21 @@
 
 
 from .code_event import CodeEvent
+from .toggle_plugins_ui_event import TogglePluginsUiEvent
 from .create_source_view_event import CreateSourceViewEvent
 from .register_completer_event import RegisterCompleterEvent
 from .unregister_completer_event import UnregisterCompleterEvent
 from .register_provider_event import RegisterProviderEvent
 from .unregister_provider_event import UnregisterProviderEvent
 from .register_command_event import RegisterCommandEvent
+from .unregister_command_event import UnregisterCommandEvent
 from .file_externally_modified_event import FileExternallyModifiedEvent
 from .file_externally_deleted_event import FileExternallyDeletedEvent
 from .set_info_labels_event import SetInfoLabelsEvent
 from .populate_source_view_popup_event import PopulateSourceViewPopupEvent
 from .filter_out_loaded_files_event import FilterOutLoadedFilesEvent
 from .get_active_view_event import GetActiveViewEvent
+from .get_source_views_event import GetSourceViewsEvent
 
 from .get_new_command_system_event import GetNewCommandSystemEvent
 from .request_completion_event import RequestCompletionEvent
@@ -34,6 +37,7 @@ from .removed_file_event import RemovedFileEvent
 from .saved_file_event import SavedFileEvent
 
 from .get_file_event import GetFileEvent
+from .get_files_event import GetFilesEvent
 from .get_swap_file_event import GetSwapFileEvent
 from .add_new_file_event import AddNewFileEvent
 from .pop_file_event import PopFileEvent

src/libs/dto/code/events/get_files_event.py

@@ -0,0 +1,13 @@
+# Python imports
+from dataclasses import dataclass, field
+
+# Lib imports
+
+# Application imports
+from .code_event import CodeEvent
+
+
+
+@dataclass
+class GetFilesEvent(CodeEvent):
+    ...

src/libs/dto/code/events/get_source_views_event.py

@@ -0,0 +1,13 @@
+# Python imports
+from dataclasses import dataclass, field
+
+# Lib imports
+
+# Application imports
+from .code_event import CodeEvent
+
+
+
+@dataclass
+class GetSourceViewsEvent(CodeEvent):
+    ...

src/libs/dto/code/events/toggle_plugins_ui_event.py

@@ -0,0 +1,17 @@
+# Python imports
+from dataclasses import dataclass, field
+
+# Lib imports
+import gi
+gi.require_version('GtkSource', '4')
+
+from gi.repository import GtkSource
+
+# Application imports
+from .code_event import CodeEvent
+
+
+
+@dataclass
+class TogglePluginsUiEvent(CodeEvent):
+    ...

src/libs/dto/code/events/unregister_command_event.py

@@ -0,0 +1,20 @@
+# Python imports
+from dataclasses import dataclass, field
+
+# Lib imports
+import gi
+gi.require_version('GtkSource', '4')
+
+from gi.repository import GtkSource
+
+# Application imports
+from .code_event import CodeEvent
+
+
+
+@dataclass
+class UnregisterCommandEvent(CodeEvent):
+    command_name: str    = ""
+    command: callable    = None
+    binding_mode: str    = ""
+    binding: str or list = ""

src/libs/dto/plugins/manifest.py

@@ -17,6 +17,7 @@ class Manifest:
     version: str       = "0.0.1"
     support: str       = "support@mail.com"
     pre_launch: bool   = False
+    autoload: bool     = True
     requests: Requests = field(default_factory = lambda: Requests())
 
     def __post_init__(self):

src/libs/event_factory.py

@@ -36,6 +36,19 @@ class EventFactory(Singleton):
 
         logger.debug(f"Registered {i} event types:")
 
+    def unregister_events(self, events: dict):
+        i = 0
+        for name, obj in events:
+            if not self._is_valid_event_class(obj): continue
+
+            event_type = self._class_name_to_event_type(name)
+
+            del self._event_classes[event_type]
+            Code_Event_Types.remove_event_class(name)
+            i += 1
+
+        logger.debug(f"Unregistered {i} event types:")
+
     def create_event(self, event_type: str, **kwargs) -> BaseEvent:
         if event_type not in self._event_classes:
             raise ValueError(f"Unknown event type: {event_type}")
@@ -80,6 +93,9 @@ class EventNamespace:
     def add_event_class(self, name: str, event_class: Type[BaseEvent]):
         setattr(self, name, event_class)
 
+    def remove_event_class(self, name: str):
+        delattr(self, name)
+
 
 
 Code_Event_Types = EventNamespace()

src/libs/singleton.py

@@ -12,21 +12,21 @@ class SingletonError(Exception):
 
 
 
-T = TypeVar('T', bound='Singleton')
+T = TypeVar('T', bound = 'Singleton')
+
+
 
 class Singleton:
-    __instance = None
+    _instances = {}
 
     def __new__(cls: Type[T], *args: Any, **kwargs: Any) -> T:
-        if cls.__instance is not None:
-            logger.debug(f"'{cls.__name__}' is a Singleton. Returning  instance...")
-            return cls.__instance
+        if cls in cls._instances: return cls._instances[cls]
 
-        cls.__instance = super(Singleton, cls).__new__(cls)
-        return cls.__instance
+        instance = super().__new__(cls)
+        cls._instances[cls] = instance
+        return instance
 
-    def __init__(self) -> None:
-        if self.__instance is not None:
-            return
-
-        super(Singleton, self).__init__()
+    @classmethod
+    def destroy(cls):
+        if cls in cls._instances:
+            del cls._instances[cls]