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

plugins/code/commands/file_history/plugin.py

@@ -0,0 +1,65 @@
+# Python imports
+
+# Lib imports
+
+# Application imports
+from libs.event_factory import Event_Factory, Code_Event_Types
+
+from plugins.plugin_types import PluginCode
+
+
+
+history: list     = []
+history_size: int = 30
+
+
+class Plugin(PluginCode):
+    def __init__(self):
+        super(Plugin, self).__init__()
+
+
+    def _controller_message(self, event: Code_Event_Types.CodeEvent):
+        if isinstance(event, Code_Event_Types.RemovedFileEvent):
+            if event.file.ftype == "buffer": return
+
+            if len(history) == history_size:
+                history.pop(0)
+
+            history.append(event.file)
+
+    def load(self):
+        self._manage_signals("register_command")
+
+    def unload(self):
+        self._manage_signals("unregister_command")
+
+    def _manage_signals(self, action: str):
+        event = Event_Factory.create_event(action,
+            command_name = "file_history_pop",
+            command      = Handler,
+            binding_mode = "released",
+            binding      = "<Shift><Control>t"
+        )
+
+        self.emit_to("source_views", event)
+
+    def run(self):
+        ...
+
+
+class Handler:
+    @staticmethod
+    def execute(
+        view: any,
+        char_str: str,
+        *args,
+        **kwargs
+    ):
+        logger.debug("Command: File History")
+        if len(history) == 0: return
+
+        view._on_uri_data_received(
+            [
+                history.pop().replace("file://", "")
+            ]
+        )