Simon Ser authored May 03, 2023 and Daniel Stone committed Oct 05, 2024

Generate and install headers containing enums. See [1].

Meson requires us to generate headers in a "include/wayland-protocols"
directory, so that include paths can be properly set up when used
as a sub-project.

[1]: wayland!312



Signed-off-by: Simon Ser <contact@emersion.fr>