Entity Creation and Destruction from scripts

- ScriptEngine: Allow destroying scripts during runtime
- Scripting:
    - Create new entities using Constructors
    - Added Destroy functions for Entities
    - Added SetScript/RemoveScript functions for Entities
    - Allow adding multiple components at once
    - Added Is-Method
- Mono Wrapper: Added Array-Functions
- WorldEnumerator: Fixed crash due to dangling list pointer after entity creation
- Scene:
    - Basic create Rigidbodies during runtime
    - Start of entity copying (For runtime use)
    - Added DestroyEntityDeferred
- SceneSerializer:
    - Added option to assign new IDs to entities

GlitchyEngine/src/Scripting/ScriptEngine.bf

@@ -238,7 +238,7 @@ static class ScriptEngine
 	{
 		for (var entry in _entityScriptInstances)
 		{
-			entry.value.ReleaseRef();
+			entry.value?.ReleaseRef();
 		}
 		_entityScriptInstances.Clear();
 
@@ -257,6 +257,9 @@ static class ScriptEngine
 		script.Instance = new ScriptInstance(entityId, scriptClass);
 		script.Instance..ReleaseRef();
 
+		if (_entityScriptInstances.TryGetValue(entityId, let currentInstance))
+			currentInstance.ReleaseRef();
+
 		_entityScriptInstances[entityId] = script.Instance..AddRef();
 
 		script.Instance.Instantiate(entityId);
@@ -264,6 +267,21 @@ static class ScriptEngine
 		return true;
 	}
 
+	public static void DestroyInstance(Entity entity, ScriptComponent* script)
+	{
+		UUID entityId = entity.UUID;
+
+		if (script.Instance != null)
+			script.Instance = null;
+
+		script.ScriptClassName = null;
+
+		if (_entityScriptInstances.TryGetValue(entityId, let currentInstance))
+			currentInstance.ReleaseRef();
+
+		_entityScriptInstances[entityId] = null;
+	}
+
 	public static void CopyEditorFieldsToInstance(Entity entity, ScriptComponent* script)
 	{
 		Log.EngineLogger.AssertDebug(script.Instance != null);