STP support and improvements

Use this when: you need to know what changed in Womp on 2025-01-30.

Don't use this for: how a feature works today. Its feature page has that.

• Added support for .STP file imports.
• Improved visibility of the Pro upgrade option.
• Improved visibility of the team creation option.

Use instead

• Wrong move: reading a changelog entry as how Womp works today. Why: later releases change things. Right move: read the feature's page under Make or Print.

Released: 2025-01-30.