Add custom clj-kondo hooks for macroses to ensure that lint rules are followed inside them.

Macros to be handled:

• fx/defn - similarly to defn with check on metadata for ::events
• fx/merge - seems like it could be lint'ed as thread macro, plus warn on limitations
• defview
• letsubs - lint as let + check on types for

I try to switch from RamBox to Ferdi. However I have several services with the same icon (slack, nextcloud). It would be a great help if I just cloud add a small textual label next to, under, over the icon. Don't care where.

Sorry that this is not a pull request, my JS/css knowledge is insufficient. I tried copying the tooltip to a div. Didn't get the correct tooltip and a misplaced div...

It would be nice to have the ability to set the presence status to away when the screen is locked to have users of traditional clients not be confused by you being constantly available.