Defines a small helper script that resets the keyboard layout (to
avoid getting stuck in Russian layout) and locks the screen via
xsecurelock, and configures home-manager to launch this automatically.
Fascinatingly this actually seems to be capable of locking the
screen *on suspend*, not *after suspend*.
Change-Id: Ib6279a445aba18c2fb5bc073b675e6e2598fa228
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2644
Reviewed-by: tazjin <mail@tazj.in>
Tested-by: BuildkiteCI