Oer dizze útwreiding

Tries to match the user experience of keyboard shortcuts from twitter, specifically the 'j', 'k', 'l', and 'Enter' buttons.

A bit less feature complete than https://chromewebstore.google.com/detail/bsky-shortcuts/cimigenihbmedhakgecdgbjgmplfjkjj

Wurdearje jo ûnderfining