Add star/polygon gizmos and refactor the separate shape drawing tools into a unified Shape tool (#2683)

* no trait ,not to fix line

* add hints

* line modification even when other shapes are selected

* added transform and anchor overlays

* removed old code

* fixed transform added hints need to fix modifier keys use

* refactored select-tool

* add point-handle-gizmo

* fix rotate bug

* implement angle snapping gizmo , fix overlay and refactor the code

* implement snapping for point-handle gizmo and implement no of point gizmo need to refactor

* implemented the gizmo for polygon, added tests , brackets to increase sides

* formatting-fix

* small nit-picks

* Make it compile

* Code review

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

editor/src/messages/tool/common_functionality/mod.rs

@@ -6,6 +6,8 @@ pub mod measure;
 pub mod pivot;
 pub mod resize;
 pub mod shape_editor;
+pub mod shape_gizmos;
+pub mod shapes;
 pub mod snapping;
 pub mod transformation_cage;
 pub mod utility_functions;