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/cli/release-topics.ts

@@ -60,7 +60,7 @@ const DRY =
   process.env.DRY_RUN === "true";
 
 /** The docs site (apps/docs/blume.config.ts `deployment.site`); sync publishes `/<num>` short links. */
-const DOCS_SITE = "https://lc.prd.lk";
+const DOCS_SITE = "https://prdcs.wiki";
 const TIMEVER = "https://gist.github.com/twolfson/de1b004dd22536b8e668";
 
 const gh = await github();