The handling for the lock key is currently unreliable (racy?). In many cases,
you have to toggle it twice to turn display off. Fix this by handling it via
acpid. Since the scripts currently depend on X11 tools, move them to the x11
subpackage. They can be moved back to the main device package in future when
Wayland support has been implemented.
Block i3 from handling the lock key to avoid additional races.
Switch to urxvt terminal in order to provide a scrollable terminal. Scrolling
is convoluted in st [1], especially when used on a mobile device.
Scrolling is a basic need, e.g. to page through `dmesg` output.
[1] https://git.suckless.org/st/file/FAQ.html#l21
Save a few CPU cycles by dropping conky. Additionally, the existing config has
not been working for a long time now, and no one missed it.
For completeness, it was no longer displaying on the desktop. Manually starting
it showed:
```
conky: X Error: type 0 Display b5e73620 XID 1302 serial 97 error_code 10 request_code 2 minor_code 0 other Display: b5e73620
```
There are instructions [1] to resolve/workaround it, but we clearly do not have
a pressing need for conky to begin with.
[1] https://github.com/brndnmtthws/conky/issues/1443#issuecomment-1557793718
[ci:skip-build]: already built successfully in CI
