Add action for color picker
Sketch 53 is adding some really nice features around the color picker, but there isn't a programmatic way to check when the user has picked a color. Our org is building a plugin to track adoption of our design system, and we'd really love to be able to track which colors our designers are using as a component of that.

We would love something like being able to look at `context.color.colorName` and `context.color.hex` or something similar to that — is this possible?