docs: add musescore-axi to the community catalog

[thatdudealso]

What Changed

• Added musescore-axi to the community catalog with its repository and descriptive metadata.
• Updated the generated README catalog table and website catalog to include the new entry.

The documentation checks, tests, lint, and local website verification passed. Review noted one warning that the catalog description may overstate prompt-based key handling behavior.

Risk Assessment

⚠️ Medium: The change is documentation-only, but it promotes a package whose advertised composition workflow has a concrete correctness defect.

Testing

All focused tests and generated-output checks passed. The local website visibly renders the new MuseScore row with the expected link, author, domain, and description.

• Evidence: Rendered MuseScore AXI catalog row (local file: /var/folders/6c/fcyqk9yj4dl5l_p5d21jqwcm0000gn/T/no-mistakes-evidence/01KYE0GSJP924CJEMK4Y2QV7HJ/musescore-catalog-table-row.png)

Pipeline

Updates from git push no-mistakes

⏭️ **intent** - skipped

✅ No issues found.

✅ **Rebase** - passed

✅ No issues found.

⚠️ **Review** - 1 warning

• ⚠️ catalog.yaml:144 - The catalog description advertises prompt-based composition, but the referenced package at reviewed revision 70ec2b9 performs case-sensitive key lookup, so prompts such as in Bb silently fall back to C while retaining major mode. Fix or narrow the advertised behavior before admission.

✅ **Test** - passed

✅ No issues found.

• pnpm run docs:test
• pnpm run docs:check
• Local website verification with chrome-devtools-axi
• Rendered catalog-row screenshot inspection

✅ **Document** - passed

✅ No issues found.

✅ **Lint** - passed

✅ No issues found.

✅ **Push** - passed

✅ No issues found.