Add PointLike implementation for GlobalTransform.

src/core.rs

@@ -378,6 +378,16 @@ impl PointLike for &Transform {
     }
 }
 
+impl PointLike for GlobalTransform {
+    fn x(&self) -> f32 {
+        self.translation.x
+    }
+
+    fn y(&self) -> f32 {
+        self.translation.y
+    }
+}
+
 impl PointLike for Vec2 {
     fn x(&self) -> f32 {
         self.x