docs: upgrade docs site to Astro 6 and update Node.js prerequisites (#244)

Upgrades the docs site from Astro 5/Starlight 0.37 to Astro 6/Starlight 0.38.
Adds Cloudflare adapter for deployment. Updates Node.js prerequisites
across all docs to match Astro 6's requirement of v22.12.0+.
Bumps catalog versions for @astrojs/cloudflare and wrangler.

docs/package.json

@@ -8,18 +8,20 @@
     "start": "astro dev",
     "build": "astro build",
     "preview": "astro preview",
-    "astro": "astro"
+    "astro": "astro",
+    "generate-types": "wrangler types"
   },
   "dependencies": {
-    "@astrojs/starlight": "^0.37.4",
-    "@astrojs/starlight-tailwind": "^4.0.2",
-    "astro": "^5.6.1",
+    "@astrojs/cloudflare": "^13.1.7",
+    "@astrojs/starlight": "^0.38.2",
+    "@astrojs/starlight-tailwind": "^5.0.0",
+    "astro": "^6.1.3",
     "sharp": "^0.34.5",
     "starlight-utils": "^1.0.0",
     "tailwindcss": "^4.1.18",
-    "wrangler": "^4.63.0"
+    "wrangler": "catalog:"
   },
-  "devDependencies": {},
-  "peerDependencies": {},
-  "optionalDependencies": {}
+  "overrides": {
+    "vite": "^7"
+  }
 }