Refactor component registration, update deps, improve JSON

- Updated Misaki.HighPerformance package versions in Core and Graphics projects.
- Added IsTrimmable to Ghost.Engine.csproj for trimming support.
- Renamed GetOrRegisterComponent to GetOrRegisterComponentID and updated all usages.
- Component registration codegen now uses a static class with [ModuleInitializer], no longer requires [EngineEntry].
- Improved JSON serialization: added string support, introduced Utf8JsonObjectScope/ArrayScope, and new extension methods for cleaner JSON writing.
- Removed [SkipLocalsInit] from Hierarchy and LocalToWorld.
- Fixed Entity.Invalid to use INVALID_ID for both fields.
- Minor cleanup: clarified comments, reorganized Ghost.Generator in solution, and disabled component serialization generator.

Ghost.Entities/Entity.cs

@@ -32,7 +32,7 @@ public readonly record struct Entity
     public static Entity Invalid
     {
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        get => new(INVALID_ID, GenerationID.MaxValue);
+        get => new(INVALID_ID, INVALID_ID);
     }
 
     internal Entity(EntityID id, GenerationID generation)
@@ -45,4 +45,4 @@ public readonly record struct Entity
     {
         return $"Entity {{ Index: {ID}, Generation: {Generation} }}";
     }
-}
+}