Vouch Request - Implement vicinae-hotkey-v1

[aurelleb]

What do you want to change?

Provide an implementation for the vicinae-hotkey-v1 wayland protocol. See that related discussion

Why do you want to make this change?

Better global shortcut handling on Wayland

I acknowledge that:

• I have read the Contributing Guide and understand the contribution process.
• I have read and agree to follow the AI Usage Policy.
• I wrote this vouch request myself, in my own voice, without AI generating it.

[pluiedev]

!vouch