Publish X uploader commercial license

[mcncarl]

What changed

• add a standalone non-commercial license to the X Article uploader Skill
• state that commercial use requires prior explicit written authorization
• clarify that the restriction does not alter Ailu core AGPL licensing
• publish the Skill contract as version 1.0.1

Validation

• 86 local contract tests passed
• 3 Cookie exporter tests passed
• Python compilation, dry-run smoke test, and pip check passed
• no X login state or Cookie was read