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/telemetry/events/plugins.d.ts

@@ -0,0 +1,9 @@
+type NextPluginsEvent = {
+    eventName: string;
+    payload: {
+        packageName: string;
+        packageVersion: string;
+    };
+};
+export declare function eventNextPlugins(dir: string): Promise<Array<NextPluginsEvent>>;
+export {};