Moved plugins and add loaded file filtering

- Moved prettify_json and lsp_completer plugins to sub categories
- Add filter_out_loaded_files to prevent opening already-loaded files
- Refactor code events into single events module
- Fix signal blocking during file load operations
- Include READONLY state in source view lifecycle handling

plugins/code/ui/lsp_manager/controllers/lsp_controller.py

@@ -0,0 +1,67 @@
+# Python imports
+import threading
+
+# Lib imports
+import gi
+from gi.repository import GLib
+
+# Application imports
+from libs.dto.code.lsp.lsp_messages import get_message_str
+from libs.dto.code.lsp.lsp_message_structs import LSPResponseTypes, ClientRequest, ClientNotification
+from .lsp_controller_websocket import LSPControllerWebsocket
+
+
+
+class LSPController(LSPControllerWebsocket):
+    def __init__(self):
+        super(LSPController, self).__init__()
+
+        # https://github.com/microsoft/multilspy/tree/main/src/multilspy/language_servers
+        # initialize-params-slim.json was created off of jedi_language_server one
+        # self._init_params   = settings_manager.get_lsp_init_data()
+
+        self._language: str            = ""
+        self._init_params: dict        = {}
+        self._event_history: dict[str] = {}
+
+        try:
+            from os import path
+            import json
+
+            _USER_HOME  = path.expanduser('~')
+            _SCRIPT_PTH = path.dirname( path.realpath(__file__) )
+            _LSP_INIT_CONFIG = f"{_SCRIPT_PTH}/../configs/initialize-params-slim.json"
+            with open(_LSP_INIT_CONFIG) as file:
+                data = file.read().replace("{user.home}", _USER_HOME)
+                self._init_params = json.loads(data)
+        except Exception as e:
+            logger.error( f"LSP Controller: {_LSP_INIT_CONFIG}\n\t\t{repr(e)}" )
+
+        self._message_id: int = -1
+        self._socket          = None
+        self.read_lock        = threading.Lock()
+        self.write_lock       = threading.Lock()
+
+    def set_language(self, language):
+        self._language = language
+
+    def set_socket(self, socket: str):
+        self._socket = socket
+
+    def unset_socket(self):
+        self._socket = None
+
+    def send_notification(self, method: str, params: {} = {}):
+        self._send_message( ClientNotification(method, params) )
+
+    def send_request(self, method: str, params: {} = {}):
+        self._message_id += 1
+        self._event_history[self._message_id] = method
+        self._send_message( ClientRequest(self._message_id, method, params) )
+
+    def get_event_by_id(self, message_id: int):
+        if not message_id in self._event_history: return
+        return self._event_history[message_id]
+
+    def handle_lsp_response(self, lsp_response: LSPResponseTypes):
+        raise NotImplementedError