Feature request: Implement screen locking protocols

[jrens]

Request to implement necessary protocols to allow for swapping to other screen lockers such as (s)waylock.

Waylock uses ext-session-lock-v1 announced for wayland 1.25. Swaylock uses the above or wlr-input-inhibitor(deprecated) and wlr-layer-shell. Obviously skip this protocol given it's already deprecated.

Many thanks