[feature request] Custom toolbar extension API

[DanielHeath]

I can see that https://github.com/basecamp/trix/blob/master/src/trix/config/toolbar.coffee allows overriding the default toolbar markup.

Is there an API for extending the Trix toolbar with new buttons / actions? Ideally with a good way to use the existing wrapping markup for modals, etc?

I've needed custom modals to add links on a couple of projects in the past.

Happy to open a PR adding docs / stabilizing an API if it'd be welcome.

[stale]

This issue has been automatically marked as stale after 90 days of inactivity. It will be closed if no further activity occurs.

[mbmjertan]

Has there been any progress on this? I can't find any docs documenting an API that allows me to extend the toolbar instead of replacing it entirely.

@DanielHeath have you perhaps done any work on this or can you share how you've implemented custom modals?

Thanks!