Mark reused buffers as busy before returning from nextBuffer (before,
they only got marked busy on init).
Re-attach wl_buffer listener after re-initializing a buffer. This lets
the re-inited buffer still get a released event.
Combine scale and translate matrices with multiply instead of overwriting
Use appendAssumeCapacity for pixel conversion loop (since we already
initialized the list with the correct size).
Added pixman and zigimg dependencies
Set up in build.zig, added to both exe and exe_check
Add new protocols:
river-layer-shell-v1
wlr-layer-shell-unstable-v1
xdg-shell (dep of wlr-layer-shell-unstable-v1)
Update Context.zig to hold wl_output, wl_shm, and a WallpaperImage
Also re-ordered all of its fields into alphabetical order
Context.create() now takes a Context.Options struct so that it takes
one arg instead of many smaller args.
Added new WallpaperImage.zig, but it's not yet actually used
