allow navigating pages in choose/filter by PageUp / PageDown

[Kiara Grouwstra]

Is your feature request related to a problem? Please describe.
i like being able to quickly navigate available options to get a sense of what i can choose.
gum choose and gum filter now paginate entries, which means the user must navigate such pages to get a sense of available options.

Describe the solution you'd like
as a user, i would expect to be able to use keys like PageUp / PageDown for such navigation (if not other options in case of gum choose as it allows using letters as well).

Describe alternatives you've considered
jjjjjjjjjjjjj

Additional context
n/a

[iconoclasthero]

Try left/right arrow keys.

[Kiara Grouwstra]

nice! that's great to know.
in the event others found this unintuitive as well tho, perhaps supporting either might still make for an improvement.