Implement pancurses backend

[TimonPost]

As a user, I want to be able to use the pancurses backend because it supports a very advanced input reading layer and works on windows.

Additional Information

• https://github.com/crossterm-rs/terminal/blob/master/docs/CONTRIBUTING.md#implementing-backend
• https://github.com/gyscos/cursive/tree/master/src/backend/curses

[TimonPost]

Done