main/ttyescape: upgrade to hkdm/buffyboard

This upgrades ttyescape to use buffyboard, a new fbkeyboard replacement by @Cherrypicker. It adds a lot of missing keys and uses the same layout as Phosh's Squeekboard, so should feel much more like home for Phosh users.

This also switches to the new HKDM daemon for hotkey handling, replacing triggerhappy.

I've included HKDM here to make testing easier, I'll update this when I make an MR to aports for it.

Please test these packages and let me know of any issues!