Direct mouse and keyboard events without udev

[ABeltramo]

This will allow Wolf to run on environments where udev/uhid are not present or restricted (ex: WSL2, LXC, cloud instances, ...). It should also reduce latency for those inputs.

Example restricted run command:

docker run \
    --name wolf \
    --network=host \
    -v /tmp/sockets:/tmp/sockets:rw \
    -v /etc/wolf:/etc/wolf:rw \
    -v /var/run/docker.sock:/var/run/docker.sock:rw \
    --device /dev/dri/ \
    ghcr.io/games-on-whales/wolf:dev-wayland-inputs

fixes #73
fixes games-on-whales/gst-wayland-display#4