feat: Added IAssignable.Unassign()

Engine.Core/StateEnable.cs

@@ -6,6 +6,7 @@ namespace Syntriax.Engine.Core;
 
 public class StateEnable : IStateEnable
 {
+    public Action<IAssignable>? OnUnassigned { get; set; } = null;
     public Action<IAssignableEntity>? OnEntityAssigned { get; set; } = null;
     public Action<IStateEnable>? OnEnabledChanged { get; set; } = null;
 
@@ -29,11 +30,21 @@ public class StateEnable : IStateEnable
 
     public bool Assign(IEntity entity)
     {
-        if (_entity is not null) // TODO: IInitialize Maybe?
+        if (_entity is not null) // TODO: Add IInitialize to IAssignable or IEntity maybe?
             return false;
 
         _entity = entity;
         OnEntityAssigned?.Invoke(this);
         return true;
     }
+
+    public bool Unassign()
+    {
+        if (_entity is null)
+            return false;
+
+        _entity = null!;
+        OnUnassigned?.Invoke(this);
+        return true;
+    }
 }