Implement the Brush without relying on a stamp texture

Test Plan: Test the BrushNode in the editor

Reviewers: Keavon

Reviewed By: Keavon

Pull Request: https://github.com/GraphiteEditor/Graphite/pull/1184

Cargo.toml

@@ -33,7 +33,6 @@ specta = { git = "https://github.com/oscartbeaumont/rspc", rev = "9725ddbfe40183
 ] }
 xxhash-rust = { version = "0.8.4", features = ["xxh3"] }
 
-
 [profile.dev.package.graphite-editor]
 opt-level = 1
 
@@ -54,6 +53,9 @@ opt-level = 3
 [profile.dev.package.image]
 opt-level = 3
 
+[profile.dev.package.png]
+opt-level = 3
+
 [profile.dev.package.xxhash-rust]
 opt-level = 3