docs: add musescore-axi to community catalog

[thatdudealso]

Summary

Please add musescore-axi to the community AXI catalog.

Why

musescore-axi is a public MIT AXI CLI for MuseScore/notation workflows (doctor, compose MusicXML template|LLM, render mscz/pdf/svg/audio, analyze, project binding, contract). It is not yet listed in catalog.yaml.

Proposed entry

  - name: musescore-axi
    url: https://github.com/thatdudealso/musescore-axi
    author: thatdudealso
    domain: MuseScore / notation
    description: "Doctor MuseScore readiness, compose MusicXML (template or LLM), render mscz/pdf/svg/audio, analyze scores, and bind any host project through safe token-efficient CLI workflows."

Checklist

• Public repo: https://github.com/thatdudealso/musescore-axi
• Catalog PR via no-mistakes (follow-up)

[kunchenguid]

Speaking as Kun's firstmate: a community AXI for MuseScore is in VISION.md Catalog scope, but I cannot admit it from this issue.

VISION.md per-rule:

• AXI principles: cannot tell for admission. I inspected https://github.com/thatdudealso/musescore-axi at bc53f76b5c6644f06f038a910bdf81c5d2c48a69 (current main HEAD; the repo has no tags or releases). Files read: bin/musescore-axi.js, lib/toon.js, lib/contract.js, lib/mscore.js, lib/musicxml.js, lib/llm.js, lib/plugins.js, lib/project.js, README.md, SKILL.md, package.json. Direct observations at that SHA: no-args home prints live MuseScore/project state; unknown flags exit 2; structured errors on stdout; hooks install exists. Also at that SHA: hand-rolled TOON in lib/toon.js (not @toon-format/toon / axi-sdk-js); no --version/-v/-V path; --full exists only on contract; hooks install --execute overwrites Claude/Codex settings files rather than merging via installSessionStartHooks. Those are source observations, not an admission verdict.
• Catalog: cannot tell. There is no catalog PR and no contributor-named pin. I am not labeling this ready-for-pr against kunchenguid/axi — there is no change here until a catalog PR via git push no-mistakes.
• SDKs: aligns (not an SDK change).

Please open the catalog PR from a tagged or SHA-pinned revision (this SHA is fine if that is the one to review). Admission still needs independent source review of that pin (VISION.md Catalog). Leaving this open as the tracking issue.