fix(ultrawork-manifesto-web): switch to Pages deployment, remove Workers config

- Use pages_build_output_dir for Cloudflare Pages
- Remove workers_dev and routes config (not applicable to Pages)
- Custom domain ulw.dev is managed in Cloudflare dashboard

Author: justsisyphus

ultrawork-manifesto-web/wrangler.toml

@@ -1,5 +1,3 @@
 name = "ultrawork-manifesto"
 compatibility_date = "2024-01-01"
-
-[assets]
-directory = "./src"
+pages_build_output_dir = "./src"