Replace the 'Vec2 to Point' node with automatic conversion machinery (#4236)

* Replace the 'Vec2 to Point' node with an 'As Vector' node and automatic conversion

* Accept a Vec2 as content for the Wrap Graphic node

* Rename the type-assertion nodes from 'To' to 'As'

* Fix the Transform node reversing a Vec2 input's direction

* Fix text migration bug

node-graph/nodes/graphic/src/graphic.rs

@@ -549,6 +549,7 @@ pub async fn wrap_graphic<T: Into<Graphic> + 'n>(
 	 	List<Color>,
 		List<GradientStops>,
 		DAffine2,
+		DVec2,
 	)]
 	content: T,
 ) -> List<Graphic> {