A very big refactor release

• ncurses dependency has been dropped in favour of tui-rs and termion
• fs_extra dependency has been removed in favour of in-house solution
  • more versatility and preserves permission bits on cut/copy/paste
• input thread rework
  • no more busy waiting with ncurses::timeout(0)
• input config rework
  • no longer require users to configure with integer keycodes
  • users now use letters like most other configs