feat: add interactive TUI

[axelfrache]

Add interactive TUI mode

Description

This PR introduces an interactive TUI using Ratatui. This mode simplifies the creation of initramfs images by guiding the user through a step-by-step process.

How Has This Been Tested?

I have manually tested the interactive flow on Linux.

• Happy Path: Successfully built a Python initramfs image using the wizard presets.
• Error Handling: verified that empty inputs are rejected and build errors are displayed correctly.
• Cancellation: Verified that Esc navigates back and q quits the application.

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules