[Docs] Add docs for AutoRegressive module design (#589)

Signed-off-by: Gaohan123 <hgaoaf@connect.ust.hk>

docs/mkdocs/javascript/mermaid.js

@@ -0,0 +1,21 @@
+// Initialize Mermaid for diagram rendering
+mermaid.initialize({
+  startOnLoad: false,
+  theme: 'default',
+  securityLevel: 'loose',
+  flowchart: {
+    useMaxWidth: true,
+    htmlLabels: true
+  }
+});
+
+// Render Mermaid diagrams when page content is ready
+document$.subscribe(() => {
+  const mermaidElements = document.querySelectorAll('.mermaid');
+  if (mermaidElements.length > 0) {
+    mermaid.run({
+      querySelector: '.mermaid',
+      nodes: mermaidElements
+    });
+  }
+});