Remove custom LSP manager plugins and add new language server clients

- Delete old lsp_manager plugin (custom websocket-based LSP client implementation)
- Delete java_lsp_client plugin
- Delete python_lsp_client plugin
- Remove unused LSP DTO files in src/libs/dto/code/lsp/
- Add new language_server_clients plugin directory
- Improve event_factory with register_events method
- Add PYTHONDONTWRITEBYTECODE to user config
- Update events init.py docstring

plugins/code/language_server_clients/lsp_manager/manifest.json

@@ -0,0 +1,8 @@
+{
+    "name": "LSP Manager",
+    "author": "ITDominator",
+    "version": "0.0.1",
+    "support": "",
+    "pre_launch": true,
+    "requests": {}
+}