docs(skills): fix creative house style reference links

[jrusso1020]

The creative house-style guide points to nonexistent nested reference and palette directories. Fix all 13 links and regenerate the creative skill fingerprint so installations receive the correction.

Successor to #1943 by @tianma-if; original authorship preserved.

Validation: every link resolves in the repository and a copied standalone skill; official manifest check and all applicable commit hooks pass. Only the creative skill hash changes.

[miguel-heygen]

Reviewed 8d73242e6afec5abe39cdde134978c5b3d83cb60. No findings.

skills/hyperframes-creative/references/house-style.md:9 and the palette table at :65 now resolve relative to the guide itself. I copied the exact-head skill into a standalone .agents/skills/hyperframes-creative directory and verified all 13 links exist and remain within that skill. Only its fingerprint changes in skills-manifest.json:41.

Validation: full diff and standalone link check; CI skills tests, manifest synchronization, project-native lint/mirror, and Codex plugin package checks passed. No prior reviews or comments. JavaScript/TypeScript CodeQL was still running; no observed check failures.

Verdict: APPROVE
Reasoning: The paths work in both source and standalone installations, and the fingerprint update ensures the correction is detected. Pending CI must complete before merge.

— Magi