feat(docs): move the site to prdcs.wiki on a Cloudflare Worker

Blume's cloudflare() adapter builds the docs as the prdcs-wiki Worker
(apps/docs/wrangler.jsonc: name, prdcs.wiki custom domain), and deploy.yml
ships it with wrangler instead of GitHub Pages. The SRS Worker's DOCS_URL /
DOCS_ORIGIN, release links and README badge follow the new domain.

apps/docs/package.json

@@ -5,6 +5,7 @@
   "scripts": {
     "dev": "blume dev",
     "build": "blume build",
+    "deploy": "wrangler deploy",
     "doctor": "blume doctor"
   },
   "dependencies": {
@@ -19,10 +20,12 @@
     "tailwind-merge": "^3.7.0"
   },
   "devDependencies": {
+    "@astrojs/cloudflare": "^14.4.4",
     "@fontsource-variable/inter": "^5.3.0",
     "@fontsource/ibm-plex-mono": "^5.3.0",
     "@types/d3-hierarchy": "^3.1.7",
     "@types/react": "^19.3.0",
-    "@types/react-dom": "^19.3.0"
+    "@types/react-dom": "^19.3.0",
+    "wrangler": "^4.125.0"
   }
 }