Add accessibility testing tools to Testing & Quality

Added 3 tools for web accessibility testing:
- axe DevTools - industry-standard accessibility testing toolkit
- RatedWithAI - AI-powered WCAG 2.2 scanner
- Lighthouse - Google's auditing tool for performance, accessibility, and SEO

Author: shibley

readme.md

@@ -116,6 +116,9 @@ Inspired by [awesome](https://github.com/sindresorhus/awesome).
 * [ESLint](https://eslint.org/) - Linting utility for JavaScript and TypeScript.
 * [Prettier](https://prettier.io/) - Opinionated code formatter.
 * [SonarQube](https://www.sonarsource.com/products/sonarqube/) - Continuous inspection of code quality.
+* [axe DevTools](https://www.deque.com/axe/devtools/) - Accessibility testing toolkit with browser extension and CI/CD integration.
+* [RatedWithAI](https://ratedwithai.com/) - AI-powered WCAG 2.2 accessibility scanner with actionable fix suggestions.
+* [Lighthouse](https://developer.chrome.com/docs/lighthouse/) - Automated auditing for performance, accessibility, SEO, and more.
 
 ## Docs & Knowledge