[cuttlefish] Add keywords

This is my first MR in this repo, aimed at improving the discoverability of Cuttlefish. It probably doesn't do much for English-speaking users, but for me, it does: My system language is German. Because of the way the search in Kickoff etc. works, searching for terms like "icon" does not yield Cuttlefish. Explicitly added English keywords, however, can be searched for even when the user's language isn't English. Let me know if you agree with my choice of keywords. :)