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

src/libs/dto/code/lsp/lsp_message_structs.py

@@ -0,0 +1,95 @@
+# Python imports
+import json
+import enum
+from dataclasses import dataclass
+
+# Lib imports
+
+# Application imports
+from .lsp_structs import TextDocumentItem
+
+
+
+class MessageEncoder(json.JSONEncoder):
+    """
+    Encodes an object in JSON
+    """
+
+    def default(self, o):  # pylint: disable=E0202
+        return o.__dict__
+
+
+@dataclass
+class ClientRequest(object):
+    def __init__(self, id: int, method: str, params: dict):
+        """
+        Constructs a new Client Request instance.
+
+        :param int id: Message id to track instance.
+        :param str method: The type of lsp request being made.
+        :param dict params: The arguments of the given method.
+        """
+        self.jsonrpc = "2.0"
+        self.id      = id
+        self.method  = method
+        self.params  = params
+
+@dataclass
+class ClientNotification(object):
+    def __init__(self, method: str, params: dict):
+        """
+        Constructs a new Client Notification instance.
+
+        :param str method: The type of lsp notification being made.
+        :param dict params: The arguments of the given method.
+        """
+        self.jsonrpc = "2.0"
+        self.method  = method
+        self.params  = params
+
+@dataclass
+class LSPResponseRequest(object):
+        """
+        Constructs a new LSP Response Request instance.
+
+        :param id result: The id of the given message.
+        :param dict result: The arguments of the given method.
+        """
+        jsonrpc: str
+        id: int
+        result: dict
+
+@dataclass
+class LSPResponseNotification(object):
+        """
+        Constructs a new LSP Response Notification instance.
+
+        :param str method: The type of lsp notification being made.
+        :params dict result: The arguments of the given method.
+        """
+        jsonrpc: str
+        method: str
+        params: dict
+
+@dataclass
+class LSPIDResponseNotification(object):
+        """
+        Constructs a new LSP Response Notification instance.
+
+        :param str method: The type of lsp notification being made.
+        :params dict result: The arguments of the given method.
+        """
+        jsonrpc: str
+        id: int
+        method: str
+        params: dict
+
+
+class MessageTypes(ClientRequest, ClientNotification, LSPResponseRequest, LSPResponseNotification, LSPIDResponseNotification):
+    ...
+
+class ClientMessageTypes(ClientRequest, ClientNotification):
+    ...
+
+class LSPResponseTypes(LSPResponseRequest, LSPResponseNotification):
+    ...