major update:
- remove threading overhead by resorting to an event driven design with mio as a backend for epoll
- Clients can now have an arbitrary amount of ip adresses and lan-mouse will automatically choose the correct one
- -> seemless switching between ethernet and wifi
- cli frontend + frontend adapter for future frontends
To reduce binary size one can now enable only specific backends, e.g.
wayland or x11 via cargo features
Additionally adds stubs for libei and xdg-desktop-portal backends
