Replace forms with a TUI

[daonb]

What's missing? Please describe your flow and where this feature will help.
The forms T7 uses today are web forms and seem out of place.
This issue is about refactoring the forms to use Terminal user Interface.

Instead of a form, t7, should open a small terminal window and let the user
key in their values. TUI also means there's not longer a submit button:
the instance the user entered the last value the form is submitted.

the modal will just have a large 'X' at the bottom

Additional context
gh CLI is a fine example of TUI forms and T7 should follow its lead.

[daonb]

The component should accept an array of maps where each map has:

• description
• default
• validValues - optional, e.g. ["yes", "no"]

After the user entered all the fields (or clicked enter to use a default) the component will finish with an array of values.