[FEAT] Properly implement vi keys

[cilginc]

We need to change the default keybinds to vi like or emacs like style. This is straight up unusable.

[turnipy]

That is if you like vi and emacs, personally I find them unusable (Nano all the way for me) :) Maybe a better feature would be to allow configurable keybinds, with a few selectable options. Since this app is available on windows too, the windows users (I am not one of them) would struggle with vi keys as default.

[UntitledHam]

Another TUI program btop has vim mode off by default but has an easy toggle to turn on vim keys in the settings. I think this might be the approach to take on the project, off by default but just a simple toggle.

[bladeacer]

Related to #351