Add webapp-uat: Playwright UAT skill (#321)

* Add webapp-uat skill to Community Contributors

Add entry for the webapp-uat browser UAT skill featuring Playwright testing,
WCAG 2.2 AA checks, i18n validation, responsive testing, and bug triage.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* Add webapp-uat: Playwright UAT skill with a11y, i18n, and error capture

* chore: refresh branch for ci

---------

Co-authored-by: Thomas <thomas@anny.trade>
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
Co-authored-by: sck_0 <samujackson1337@gmail.com>

README.md

@@ -444,6 +444,7 @@ This collection would not be possible without the incredible work of the Claude
 - **[uberSKILLS](https://github.com/uberskillsdev/uberSKILLS)**: Design, test, and deploy Claude Code Agent Skills through a visual, AI-assisted workflow.
 - **[christopherlhammer11-ai/tool-use-guardian](https://github.com/christopherlhammer11-ai/tool-use-guardian)**: Source for the Tool Use Guardian skill — tool-call reliability wrapper with retries, recovery, and failure classification.
 - **[christopherlhammer11-ai/recallmax](https://github.com/christopherlhammer11-ai/recallmax)**: Source for the RecallMax skill — long-context memory, summarization, and conversation compression for agents.
+- **[tsilverberg/webapp-uat](https://github.com/tsilverberg/webapp-uat)**: Full browser UAT skill — Playwright testing with console/network error capture, WCAG 2.2 AA accessibility checks, i18n validation, responsive testing, and P0-P3 bug triage. Read-only by default, works with React, Vue, Angular, Ionic, Next.js.
 
 ### Inspirations