Add a helpful alias for vim users

[Pyjou]

As a vim user, I always do a :q!. I therefore propose adding it as an alias.

It's just to improve the productivity of vim users.

[derailed]

@Pyjou Thanks for this PR! I understand the mnemonic here and the parallel but k9s != vi and hence how does typing an extra character improves anyone productivity? Unless there is indeed a differentiator?? What could be interesting here if a user exits k9s via q! could tell k9s to exit without modifying configurations. But that would be a much bigger fish to fry and not sure if there is value in that??