feat(web): payload cms v3 + blog + changelog data model

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

apps/web/next.config.ts

@@ -1,4 +1,5 @@
 import type { NextConfig } from "next";
+import { withPayload } from "@payloadcms/next/withPayload";
 
 import env from "./env.config";
 
@@ -124,4 +125,4 @@ const withBundleAnalyzer = require("@next/bundle-analyzer")({
   enabled: env.ANALYZE,
 });
 
-export default withBundleAnalyzer(config);
+export default withPayload(withBundleAnalyzer(config));