[skip ci]add skills

[hsliuustc0106]

PLEASE FILL IN THE PR DESCRIPTION HERE ENSURING ALL CHECKLIST ITEMS (AT THE BOTTOM) HAVE BEEN CONSIDERED.

Purpose

add skills for agentic coding

Test Plan

none

Test Result

none

Essential Elements of an Effective PR Description Checklist

• The purpose of the PR, such as "Fix some issue (link existing issues this PR will resolve)".
• The test plan. Please provide the test scripts & test commands. Please state the reasons if your codes don't require additional test scripts. For test file guidelines, please check the test style doc
• The test results. Please paste the results comparison before and after, or the e2e results.
• (Optional) The necessary documentation update, such as updating supported_models.md and examples for a new model. Please run mkdocs serve to sync the documentation editions to ./docs.
• (Optional) Release notes update. If your change is user-facing, please update the release notes draft.

BEFORE SUBMITTING, PLEASE READ https://github.com/vllm-project/vllm-omni/blob/main/CONTRIBUTING.md (anything written below this line will be removed by GitHub Actions)

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[hsliuustc0106]

Blocker scan:

Category	Result
Documentation	PASS

OVERALL: NO BLOCKERS

VERDICT: COMMENT

Doc-only PR: adds Claude agentic coding skills. skill is comprehensive (534 lines covering Path A/B, Cache-DiT, parallelism patterns). covers 5-phase TTS integration. README.md provides clear overview.

Good addition to contributor tooling. Gates pass.