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/.next/dev/server/pages/_app/build-manifest.json

@@ -0,0 +1,23 @@
+{
+  "devFiles": [],
+  "ampDevFiles": [],
+  "polyfillFiles": [],
+  "lowPriorityFiles": [],
+  "rootMainFiles": [],
+  "pages": {
+    "/_app": [
+      "static/chunks/node_modules_next_dist_compiled_8ca6b690._.js",
+      "static/chunks/node_modules_next_dist_shared_lib_8bac8163._.js",
+      "static/chunks/node_modules_next_dist_client_5a8a528e._.js",
+      "static/chunks/node_modules_next_dist_b3fb3b5f._.js",
+      "static/chunks/node_modules_next_app_72f3d36f.js",
+      "static/chunks/[next]_entry_page-loader_ts_742e4b53._.js",
+      "static/chunks/node_modules_react-dom_4411d9bd._.js",
+      "static/chunks/node_modules_7f09fef0._.js",
+      "static/chunks/[root-of-the-server]__45f039c3._.js",
+      "static/chunks/pages__app_2da965e7._.js",
+      "static/chunks/turbopack-pages__app_0fce199e._.js"
+    ]
+  },
+  "ampFirstPages": []
+}