staging/tearing-control: Add protocol support

Fixes #3249 (closed).

Pipelines should succeed whenever wayland-protocols gets updated. For now they can't find the xml.

Criticism / suggestions welcome, never made an impl for wlroots before.

Seems to work, tested with Hyprland and hyprpicker (a wayland utility I wrote)

Test code and results

Client:

Server:

Result:

Compositor impl: Hyprland@PR1880