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
* support for cmdline args and better error handling
* make config.toml optional
* dont abuse panic for error handling
* update doc
* more panics removed
* more unwraps removed
* cleanup Cargo.toml
* exclude backend from windows build
* remove env include in windows build
* remove Backend from windows build
* fix compiler warning
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
