Refactor LSP manager architecture and event + completion pipeline

- Replace legacy LSPManagerClient + LSPManagerUI with ClientManager and UIManager
- Remove WebsocketClient in favor of unified Websocket implementation
- Move LSP initialization config loading into centralized config module
- Update LSPClient to support dynamic socket, improved init params, and doc version tracking
- Introduce range-based didChange notifications and add implementation + references requests
- Expand LSPClientEvents to support implementation/references and structured range edits
- Simplify websocket response handling and normalize LSP response parsing flow
- Decouple UI from LSP manager core; UI now emits address/port for client creation
- Refactor completion provider pipeline:
  - Split TextChangedEvent into TextInsertedEvent and DeleteRangeEvent
  - Update ProviderResponseCacheBase and controller dispatch paths accordingly
- Improve SourceBuffer and SourceFile event tracking with delete-range support
- Update plugin system:
  - Centralize command/provider registration via helper methods
  - Add LSP commands: definition, references, implementation, toggle UI
- Enhance response handlers to support references and implementation hooks
- Improve Python LSP config (jedi completion, signatures, references enabled)
- Fix minor GTK lifecycle and buffer signal handling issues
- Clean up unused imports, dead code, and outdated JSON server configs

plugins/code/language_server_clients/lsp_manager/commands.py

@@ -0,0 +1,87 @@
+# Python imports
+
+# Lib imports
+import gi
+
+gi.require_version('Gtk', '3.0')
+gi.require_version('GtkSource', '4')
+
+from gi.repository import Gtk
+from gi.repository import GtkSource
+
+# Application imports
+
+
+
+class Commands:
+    lsp_manager: callable = None
+
+    class lsp_manager_toggle:
+        @staticmethod
+        def execute(
+            source_view: GtkSource,
+            char_str: str,
+            modkeys_states: tuple
+        ):
+            logger.debug("Command: LSP Manager Toggle")
+            if Commands.lsp_manager.ui_manager.is_visible():
+                Commands.lsp_manager.ui_manager.hide()
+            else:
+                Commands.lsp_manager.ui_manager.show()
+
+    class lsp_references:
+        @staticmethod
+        def execute(
+            view: GtkSource,
+            char_str: str,
+            modkeys_states: tuple
+        ):
+            logger.debug("Command: LSP References")
+
+            file   = view.command.exec("get_current_file")
+            buffer = view.get_buffer()
+            iter   = buffer.get_iter_at_mark( buffer.get_insert() )
+            line   = iter.get_line()
+            column = iter.get_line_offset()
+
+            Commands.lsp_manager.client_manager.process_references_definition(
+                file.ftype, file.fpath, line, column
+            )
+
+    class lsp_implementation:
+        @staticmethod
+        def execute(
+            view: GtkSource,
+            char_str: str,
+            modkeys_states: tuple
+        ):
+            logger.debug("Command: LSP Implements")
+
+            file   = view.command.exec("get_current_file")
+            buffer = view.get_buffer()
+            iter   = buffer.get_iter_at_mark( buffer.get_insert() )
+            line   = iter.get_line()
+            column = iter.get_line_offset()
+
+            Commands.lsp_manager.client_manager.process_implementation_definition(
+                file.ftype, file.fpath, line, column
+            )
+
+    class lsp_definition:
+        @staticmethod
+        def execute(
+            view: GtkSource,
+            char_str: str,
+            modkeys_states: tuple
+        ):
+            logger.debug("Command: LSP Definition (Go-To)")
+
+            file   = view.command.exec("get_current_file")
+            buffer = view.get_buffer()
+            iter   = buffer.get_iter_at_mark( buffer.get_insert() )
+            line   = iter.get_line()
+            column = iter.get_line_offset()
+
+            Commands.lsp_manager.client_manager.process_definition(
+                file.ftype, file.fpath, line, column
+            )