Add text colour

[victorbnl]

In addition to the various rich text formatting options there are, it would be nice to be able to change the text colour. If you accept my feature request, I would be open to try to implement it myself.

[maelchiotti]

@victorbnl I think I didn't enable that feature (which is supported by the editor library) because it would break the markdown export. I'll have to check. If that's the case, I am working on a PR in the library in question to fix that.

[victorbnl]

Can you link the PR in question so I can try to help if needed and get notified when the issue is solved so I can think about how to implement it in Material Notes?

[maelchiotti]

The PR is here: fleather-editor/fleather#418.

But I'll probably implement it myself when the PR passes.