feat(blog): add file-based blog with dynamic slugs, MDX content and layout shell

- Introduced blog routing using Next.js App Router
- Implemented dynamic [slug] pages for blog posts
- Added MDX-based content loading via lib/posts
- Integrated shared TopBar layout with navigation
- Established clear content, lib and component separation

apps/public-web/node_modules/next/dist/cli/next-start.d.ts

@@ -0,0 +1,16 @@
+#!/usr/bin/env node
+import '../server/lib/cpu-profile';
+export type NextStartOptions = {
+    port: number;
+    hostname?: string;
+    keepAliveTimeout?: number;
+    experimentalNextConfigStripTypes?: boolean;
+};
+/**
+ * Start the Next.js server
+ *
+ * @param options The options for the start command
+ * @param directory The directory to start the server in
+ */
+declare const nextStart: (options: NextStartOptions, directory?: string) => Promise<void>;
+export { nextStart };