Add Arc drawing mode to the Shape tool and the associated angle gizmos (#2757)

* implement arc gizmo handler

* fixed wrapping need to fix snapping and overlays

* fixed all the issues

* Code review

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Co-authored-by: Keavon Chambers <keavon@keavon.com>

node-graph/gcore/src/vector/misc.rs

@@ -67,7 +67,7 @@ pub enum GridType {
 #[widget(Radio)]
 pub enum ArcType {
 	#[default]
-	Open,
+	Open = 0,
 	Closed,
 	PieSlice,
 }