feat: confirmation modal for D and p

[kennyfrc]

This change introduces a confirmation dialog when deleting an instance and when pushing changes to GitHub.

Fixes #102.

Also adds a test file called app/app_test.go that you can run with go test ./app -run TestConfirm -v.

[mufeez-amjad]

@kennyfrc thanks so much for your PR, this is great!

I pushed c634fc2 which adds a new confirmationOverlay instead of re-using the textOverlay, as well as cleaning up the dialog slightly.

CleanShot.2025-06-04.at.00.06.37.mp4

[kennyfrc]

@mufeez-amjad Great, thank you! Thanks as well for the project - I've been using it daily.

[jayshrivastava]

👋🏽 @kennyfrc Would you mind signing our CLA? If you could comment that you have read and agree to the terms, that would be great. Thanks again for the contribution!

[kennyfrc]

I have read and I agree to the CLA terms 👍 @jayshrivastava

[jayshrivastava]

Thanks!