- remove dependency on atomicgo.dev/keyboard
- add dependency on github.com/eiannone/keyboard
- include keyhandling as non-blocking in frondend/main
- refactor keyhandler()
🤖
- remove `shared` package and shared.Message
- rename `notifications` package to `frontend`
- introduce a channel send the received ServerMessages to the frontend handler(s)
- move keyhandler to goroutine
- simplify password handling in Start function
- update import names when importing from GoTomoto
