[REQ] Add option to remove keyboard shortcuts

### Is your feature request related to a problem? Please describe

Problem: I want to use one of the keyboard shortcuts that Keka uses for something else. I never use the keyboard shortcuts Keka has, and they're disabled, but macOS does not give a good way to unbind them.


### Describe the solution you'd like

I don't just want to disable the keyboard shortcuts in System Preferences, I want to completely remove them (or at least be able to unset the key combination.)

I do want to keep the finder right-click menu options intact, in case that matters.

### Describe alternatives you've considered

I could sacrifice another series of keys for this unused shortcut, but I do not like having to think of new shortcuts that hopefully nothing else on my system happens to use.

### Additional context

I'm running Sonoma, and Keka 1.4.6.