docs: Add documentation for the @poap-xyz/frames package

[reobin]

Description

Add docs pages for @poap-xyz/frames.

Type of change

• [ ] 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)
• [x] Documentation update (if none of the other choices apply)

Checklist

• [x] I have read the CONTRIBUTING document.
• [ ] I have added tests to cover my changes.
• [x] All new and existing tests passed.
• [x] I have updated the documentation accordingly.

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[reobin]

@rlajous Added the package meta, and it's better now.