Implement the Brush tool (#1099)

* Implement Brush Node

* Add color Input

* Add VectorPointsNode

* Add Erase Node

* Adapt compilation infrastructure to allow non Image Frame inputs

* Remove debug output from TransformNode

* Fix transform calculation

* Fix Blending by making the brush texture use associated alpha

* Code improvements and UX polish

* Rename Opacity to Flow

* Add erase option to brush node + fix freehand tool

* Fix crash

* Revert erase implementation

* Fix flattening id calculation

* Fix some transformation issues

* Fix changing the pivot location

* Fix vector data modify bounds

* Minor fn name cleanup

* Fix some tests

* Fix tests

---------

Co-authored-by: Keavon Chambers <keavon@keavon.com>
Co-authored-by: hypercube <0hypercube@gmail.com>

editor/src/messages/tool/tool_message.rs

@@ -61,9 +61,9 @@ pub enum ToolMessage {
 	#[child]
 	Text(TextToolMessage),
 
-	// #[remain::unsorted]
-	// #[child]
-	// Brush(BrushToolMessage),
+	#[remain::unsorted]
+	#[child]
+	Brush(BrushToolMessage),
 	// #[remain::unsorted]
 	// #[child]
 	// Heal(HealToolMessage),
@@ -119,6 +119,8 @@ pub enum ToolMessage {
 	#[remain::unsorted]
 	ActivateToolShape,
 
+	#[remain::unsorted]
+	ActivateToolBrush,
 	#[remain::unsorted]
 	ActivateToolImaginate,
 	#[remain::unsorted]