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

user_config/bin/<change_me>

@@ -6,6 +6,8 @@
 # set -o errexit      ## To exit on error
 # set -o errunset     ## To exit if a variable is referenced but not set
 
+export PYTHONDONTWRITEBYTECODE=1
+
 
 function main() {
     call_path=`pwd`