Description

Adding a polylith- prefix to all the migration skills.

Motivation and Context

To avoid any name collisions with other skills.
To align with how the library-skills package adds the symlinks to projects (flat, and not per project).

How Has This Been Tested?

n/a

Types of changes

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

Checklist:

• I have read the code of conduct.
• I have read the contributing guide.
• I have updated the documentation accordingly (if applicable).