feat(site): add component documentation site

Add Vite, React, MDX, and Tailwind documentation infrastructure.

Document component, handbook, overview, and utility routes.

Add interactive examples for every component family.

Deduplicate React resolution and load the Tailwind 4 theme configuration.

site/package.json

@@ -0,0 +1,33 @@
+{
+  "private": true,
+  "type": "module",
+  "scripts": {
+    "dev": "vite --host 127.0.0.1",
+    "build": "tsc --noEmit && vite build",
+    "preview": "vite preview --host 127.0.0.1"
+  },
+  "dependencies": {
+    "@mdx-js/react": "^3.1.0",
+    "@tanstack/react-virtual": "^3.14.5",
+    "@vitejs/plugin-react": "^6.0.3",
+    "lucide-react": "^1.23.0",
+    "match-sorter": "^8.3.0",
+    "react": "^19.0.0",
+    "react-dom": "^19.0.0",
+    "rehype-pretty-code": "^0.14.4",
+    "remark-directive": "^4.0.0",
+    "remark-gfm": "^4.0.1",
+    "shiki": "^4.3.1",
+    "vite": "^8.1.3",
+    "zod": "^4.4.3"
+  },
+  "devDependencies": {
+    "@mdx-js/rollup": "^3.1.0",
+    "@tailwindcss/postcss": "^4.3.2",
+    "@types/node": "^26.1.0",
+    "autoprefixer": "^10.4.20",
+    "postcss": "^8.4.49",
+    "tailwindcss": "^4.3.2",
+    "typescript": "^6.0.3"
+  }
+}