I have implemented colour gradients for Graphite, a work in progress vector editor written in the Rust programming language with Web Assembly.  The colour gradient tool is a new tool based on the new overlays system by @Truedoctor that allow users to draw in gradients, edit the start and and points by dragging the handles and edit the colours by using the new properties panel on the right hand side which has been added by @mfish33. View the code on GitHub.


Challenges for this MR included mapping the graident start and end points correctly into gradient units as well as making it so all of the gradients went into one `<defs>` tag at the top of the svg.

I have implemented the transformation cage for Graphite, a work in progress vector editor written in the Rust programming language with Web Assembly. The transformation cage expanded on TrueDoctor's work adding a bounding box for selected layers whilst in select mode to allow the edges of the box to be draggable to scale the selection; and to add some blue squares on the corners and the edges to provide visual hints.  I also added the ability to rotate the selection by dragging 40px from the edges, as requested by Keavon.