Improve the user interaction for add/remove root keys

[kairoaraujo]

Description

This PR improves the usability of the CLI while interacting with the Root Keys, making the interface easier to use for add, remove root keys.

https://github.com/repository-service-tuf/repository-service-tuf-cli/assets/546882/fa6ba2b3-fb6a-4b96-8789-538f88a86928

Types of changes

• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality not to work as expected)

Additional requirements

• [x] Tests have been added for the bug fix or new feature
• [] Docs have been added for the bug fix or new feature

Code of Conduct

By submitting this PR, you agree to follow our Code of Conduct.

• [x] I agree to follow this project's Code of Conduct

[kairoaraujo]

I need to figure out how to implement it for the FT.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 98.96%. Comparing base (47d0a69) to head (3ed2457). Report is 109 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #629 +/- ## ========================================== + Coverage 98.90% 98.96% +0.06% ========================================== Files 20 30 +10 Lines 1367 1932 +565 ========================================== + Hits 1352 1912 +560 - Misses 15 20 +5 ```

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