Refactor LSP manager and file handling

- Refactored LSPClient and LSPClientEvents to use workspace path and initialization options.
- Updated LSPManager to pass workspace path to client creation.
- Modified LSPManagerUI to handle user home paths and workspace configurations.
- Enhanced file handling to manage buffer and directory types.
- Introduced CreatedSourceViewEvent for source view creation event tracking.
- Added better error handling and logging for file operations.

Other minor UI and widget adjustments for improved layout and drag-and-drop handling.

plugins/code/event-watchers/file_state_watcher/plugin.py

@@ -24,6 +24,7 @@ class Plugin(PluginCode):
         self.emit_to("files", event)
 
         file = event.response
+        if not file: return
         if file.ftype == "buffer": return
 
         file.check_file_on_disk()