Stephan Lo 12e31ede91 test: add comprehensive testing infrastructure ... - Add npm test scripts for build, markdown, HTML, and link validation - Install markdownlint-cli for content quality checks - Install html-validate for HTML5 conformity validation - Add htmltest (via devbox) for internal/external link checking - Configure test rules in .htmltest.yml, .htmlvalidate.json, .markdownlint.json - Add GitHub Actions workflow for automated CI testing - Add TESTING.md documentation for test usage		2025-10-23 14:02:39 +02:00
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workflows	test: add comprehensive testing infrastructure	2025-10-23 14:02:39 +02:00