Add Iterator.Any()

src/gaemstone.ECS/Internal/Iterator.cs

@@ -55,6 +55,9 @@ public unsafe class Iterator
 	public virtual bool Next()
 		=> ecs_iter_next(Handle);
 
+	public bool Any()
+		{ using (this) return Next(); }
+
 	public Entity First()
 		=> new(ecs_iter_first(Handle));