feat: add documentation website with Docusaurus build pipeline (#1177)

* feat: add documentation website with Docusaurus build pipeline

* feat(docs): add AI discovery meta tags for llms.txt files

- Add global headTags with ai-terms, llms, llms-full meta tags
- Update landing page link to clarify AI context purpose

* fix(docs): restore accidentally deleted faq.md and glossary.md

Files were removed in 12dd97fe during path restructuring.

* fix(docs): update broken project-readme links to GitHub URL

* feat(schema): add compound trigger format validation

tools/lib/xml-utils.js

@@ -0,0 +1,13 @@
+/**
+ * Escape XML special characters in a string
+ * @param {string} text - The text to escape
+ * @returns {string} The escaped text
+ */
+function escapeXml(text) {
+  if (!text) return '';
+  return text.replaceAll('&', '&amp;').replaceAll('<', '&lt;').replaceAll('>', '&gt;').replaceAll('"', '&quot;').replaceAll("'", '&apos;');
+}
+
+module.exports = {
+  escapeXml,
+};