Passthrough only mode

[Bios-Marcel]

I plan to not support all features. For example, the native implementations wont account for global installations for the forseeable future.

Alternatively I thought about a passthrough mode, where you can say "ignore" the native implementation. This way, we can have some native coverage, while still providing full support and autocomplete.

This can be done via a --passthrough/-p flag or any other way of configuration.

Flag collection can be improved to avoid duplication.