Bind ctrl-alt-backspace to launch alpaca

[castrojo]

The alpaca dev was kind enough to add a --new-chat flag to the latest release: https://github.com/Jeffser/Alpaca/releases/tag/2.8.0

Let's bind that to ctrl-alt-backspace, the idea being if you're using your PC and you need to chat you can just fire up a new chat with one command. I don't know the keyboard code to the new AI key on new PCs, but if we could figure that out we should bind that too.

This should be set here along with the others:

bluefin/system_files/silverblue/etc/dconf/db/distro.d/02-bluefin-keybindings

Line 19 in c271947

[org/gnome/settings-daemon/plugins/media-keys/custom-keybindings/custom3]

Also note, we don't ship Alpaca by default, we don't want to touch the ISOs right now, but if the user follows our docs they'll just install it and then the keyboard shortcut will work.

[m2Giles]

Didn't we just remove all of the AI just stuff?

[hanthor]

Copilot key:

[14:     wl_keyboard] key: serial: 28957; time: 23588769; key: 50; state: 1 (pressed)
                      sym: Shift_L      (65505), utf8: ''
[14:     wl_keyboard] modifiers: serial: 0; group: 16
                      depressed: 00002041: Shift Mod4 Super 
                      latched: 00000000
                      locked: 00000010: Mod2 
[14:     wl_keyboard] key: serial: 28959; time: 23589750; key: 50; state: 0 (released)
                      sym: Shift_L      (65505), utf8: ''
[14:     wl_keyboard] modifiers: serial: 0; group: 16
                      depressed: 00002040: Mod4 Super 
                      latched: 00000000
                      locked: 00000010: Mod2 
[14:     wl_keyboard] key: serial: 28961; time: 23589757; key: 133; state: 0 (released)
                      sym: Super_L      (65515), utf8: ''
[14:     wl_keyboard] modifiers: serial: 0; group: 16
                      depressed: 00000000
                      latched: 00000000
                      locked: 00000010: Mod2 

Looks like it's Shift Mod4 Super when it's held down and just Mod4 Super when release, for dication ability?