ECS refactor: new ComponentSet, serialization, generators

Major ECS API overhaul: added ComponentSet, refactored ComponentRegistry, and updated all entity/component creation methods. Introduced robust custom serialization infrastructure and per-component source generators for registration and (de)serialization. Updated editor, engine, and test code to use new APIs. Improved code quality, naming, and performance throughout. Removed obsolete code and updated dependencies.

Ghost.Engine/Resources/EngineData.cs

@@ -4,5 +4,5 @@ internal class EngineData
 {
     public const string ENGINE_NAME = "Ghost Engine";
 
-    public readonly static Version s_engineVersion = new(0, 1, 0);
+    public readonly static Version EngineVersion = new(0, 1, 0);
 }