merge upstream fumadocs dev (66 commits up to 16.6.5) with Hanzo branding

Merges upstream commits 1ad82416..20cf96d42 from fuma-nama/fumadocs dev branch,
including:

- Core/UI/Base-UI version bump 16.5.3 -> 16.6.5
- OpenAPI version bump 10.3.4 -> 10.3.9 (3.2 support, server selector)
- TypeScript version bump 5.1.3 -> 5.1.4 (tag parser, type table ID)
- Markdown search improvements (inline elements, codeblocks, Vietnamese)
- CSS performance improvements and accessibility fixes
- MDX stringification using mdast-util-to-markdown
- Sidebar active link items support
- Mixedbread search moved to server-side
- Tailwind CSS plugin forwarding for module resolution
- Cursor integration replacing T3 Chat in templates
- Template cleanup (removed deprecated mdx-remote example)

All fumadocs-* packages renamed to @hanzo/docs-* namespace.
Removed duplicate +next+fuma-docs-mdx templates (using hanzo-docs-mdx).
Upstream metadata (homepage, repository) updated to Hanzo.

examples/python/package.json

@@ -22,8 +22,8 @@
   "devDependencies": {
     "@tailwindcss/postcss": "^4.1.18",
     "@types/mdx": "^2.0.13",
-    "@types/node": "25.2.1",
-    "@types/react": "^19.2.13",
+    "@types/node": "25.2.3",
+    "@types/react": "^19.2.14",
     "@types/react-dom": "^19.2.3",
     "postcss": "^8.5.6",
     "tailwindcss": "^4.1.18",