libei and keysym/text events

If you've been paying attention (and I know you have, because it'd be embarrassing for you if you didn't) you'd have noticed that libei 1.6 (May 2026) added support for keysym and text events. libei sends logical events between a libei client and an EIS implementation (typically: a Wayland compositor) but the keyboard interface it had was designed like real keyboards: key codes together with an…