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/redirects.ts

@@ -1,5 +1,5 @@
 // Generated by `bun run sync` (apps/cli/sync.ts) — do not edit.
-// `/leetcode/<num>` → that problem's page; exact paths, base added by Blume.
+// `/<num>` → that problem's page; exact paths, base added by Blume.
 export default [
   { from: "/1", to: "/hash-table/two-sum" },
   { from: "/2", to: "/hybrid-structures/add-two-numbers" },