Major completion provider overhaul; pluigin load and pattern improvements; css overhaul/cleanup; source view state modes added

src/libs/dto/code/register_provider_event.py

@@ -0,0 +1,19 @@
+# Python imports
+from dataclasses import dataclass, field
+
+# Lib imports
+import gi
+gi.require_version('GtkSource', '4')
+
+from gi.repository import GtkSource
+
+# Application imports
+from ..base_event import BaseEvent
+
+
+
+@dataclass
+class RegisterProviderEvent(BaseEvent):
+    provider_name: str                     = ""
+    provider: GtkSource.CompletionProvider = None
+    language_ids: list                     = field(default_factory=lambda: [])