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/ui/telescope/list_box.py

@@ -115,9 +115,9 @@ class ListBox(Gtk.ListBox):
 
         self.select_row(next_row)
 
-    def add_row(self, event):
-        label      = Gtk.Label(label = event.file.fname)
-        label.file = event.file
+    def add_row(self, file):
+        label      = Gtk.Label(label = file.fname)
+        label.file = file
         label.show()
         self.add(label)
 

plugins/code/ui/telescope/plugin.py

@@ -25,7 +25,7 @@ class Plugin(PluginCode):
         if isinstance(event, Code_Event_Types.FocusedViewEvent):
             ...
         elif isinstance(event, Code_Event_Types.AddedNewFileEvent):
-            telescope.list_box.add_row(event)
+            telescope.list_box.add_row(event.file)
         elif isinstance(event, Code_Event_Types.RemovedFileEvent):
             telescope.list_box.remove_row(event)
         elif isinstance(event, Code_Event_Types.FilePathSetEvent):
@@ -46,7 +46,7 @@ class Plugin(PluginCode):
         )
         self.emit_to("source_views", event)
 
-        event  = Event_Factory.create_event(
+        event = Event_Factory.create_event(
             "create_source_view",
             state = SourceViewStates.INDEPENDENT
         )
@@ -55,12 +55,38 @@ class Plugin(PluginCode):
         source_view = event.response
         telescope.set_source_view(source_view)
 
-        event       = Event_Factory.create_event(
+        event = Event_Factory.create_event(
             "register_completer",
             completer = source_view.get_completion()
         )
         self.emit_to("completion", event)
 
+        event = Event_Factory.create_event("get_files")
+        self.emit_to("files", event)
+        for file in event.response:
+            telescope.list_box.add_row(file)
+
+    def unload(self):
+        window = self.request_ui_element("main-window")
+
+        telescope.unmap_parent_resize_event(window)
+
+        event = Event_Factory.create_event("unregister_command",
+            command_name = "telescope",
+            command      = Handler,
+            binding_mode = "released",
+            binding      = "<Control>b"
+        )
+        self.emit_to("source_views", event)
+
+        event = Event_Factory.create_event(
+            "unregister_completer",
+            completer = telescope.source_view.get_completion()
+        )
+        self.emit_to("completion", event)
+
+        telescope.destroy()
+
 
     def run(self):
         ...

plugins/code/ui/telescope/telescope.py

@@ -33,6 +33,7 @@ class Telescope(Gtk.Dialog):
     def _setup_signals(self):
         self.connect("focus-out-event", self._focus_out_event)
         self.connect("show", self._show)
+        self.connect("destroy", self._handle_destroy)
 
     def _subscribe_to_events(self):
         ...
@@ -93,7 +94,10 @@ class Telescope(Gtk.Dialog):
         self.source_view.set_buffer(buffer)
 
     def map_parent_resize_event(self, parent):
-        parent.connect("size-allocate", lambda w, r: self._map_resize(self, parent))
+        self.size_allocate_id = parent.connect("size-allocate", lambda w, r: self._map_resize(self, parent))
+
+    def unmap_parent_resize_event(self, parent):
+        parent.disconnect(self.size_allocate_id)
 
     def set_source_view(self, source_view):
         scrolled_win     = Gtk.ScrolledWindow()
@@ -103,3 +107,8 @@ class Telescope(Gtk.Dialog):
         self.main_box.pack_end(scrolled_win, True, True, 0)
 
         scrolled_win.show_all()
+
+    def _handle_destroy(self, widget):
+        self.disconnect_by_func(self._focus_out_event)
+        self.disconnect_by_func(self._show)
+        self.disconnect_by_func(self._handle_destroy)