Description

This PR fixes:

• pixi clean cache --build removing the correct folders by using the CacheDir struct from the command dispatcher
• pixi clean not always printing Workspace registry cleaned
• Color and text improvements for the output of the removal.
• Some small typos

How Has This Been Tested?

Cleaned some of my local workspaces

AI Disclosure

• This PR contains AI-generated content.
  • I have tested any AI-generated content in my PR.
  • I take responsibility for any AI-generated content in my PR.

Tools: Claude

Checklist:

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added sufficient tests to cover my changes.
• I have verified that changes that would impact the JSON schema have been made in schema/model.py.