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/compiled/client-only/error.js

@@ -0,0 +1,4 @@
+throw new Error(
+  "This module cannot be imported from a Server Component module. " +
+    "It should only be used from a Client Component."
+);

apps/public-web/node_modules/next/dist/compiled/client-only/package.json

@@ -0,0 +1,19 @@
+{
+  "name": "client-only",
+  "description": "This is a marker package to indicate that a module can only be used in Client Components.",
+  "keywords": [
+    "react"
+  ],
+  "version": "0.0.1",
+  "homepage": "https://reactjs.org/",
+  "bugs": "https://github.com/facebook/react/issues",
+  "license": "MIT",
+  "files": ["index.js", "error.js"],
+  "main": "index.js",
+  "exports": {
+    ".": {
+      "react-server": "./error.js",
+      "default": "./index.js"
+    }
+  }
+}