Vendored Wayland protocol descriptions. These are committed verbatim so the
build is self-contained and reproducible; update them deliberately, not by
re-fetching a moving branch.

xdg-shell.xml
    upstream: wayland-protocols, stable/xdg-shell/xdg-shell.xml
    version:  1.44 (xdg_wm_base version 7)
    license:  MIT/Expat
    note:     only needed because wlr-layer-shell references xdg_popup.

xdg-output-unstable-v1.xml
    upstream: wayland-protocols, unstable/xdg-output/xdg-output-unstable-v1.xml
    version:  1.44 (zxdg_output_manager_v1 version 3)
    license:  MIT/Expat
    note:     authoritative logical output geometry for multi-monitor.

wlr-layer-shell-unstable-v1.xml
    upstream: https://gitlab.freedesktop.org/wlroots/wlr-protocols
    path:     unstable/wlr-layer-shell-unstable-v1.xml
    commit:   bf4fc79abc359eea5a0edec0ac6d4a2b2955f82a (2026-03-09)
    version:  zwlr_layer_shell_v1 version 5
    license:  MIT/Expat

wlr-virtual-pointer-unstable-v1.xml
    upstream: https://gitlab.freedesktop.org/wlroots/wlr-protocols
    path:     unstable/wlr-virtual-pointer-unstable-v1.xml
    commit:   bf4fc79abc359eea5a0edec0ac6d4a2b2955f82a (2026-03-09)
    version:  zwlr_virtual_pointer_v1 version 2
    license:  MIT/Expat