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/sprintf-js/bower.json

@@ -0,0 +1,14 @@
+{
+  "name": "sprintf",
+  "description": "JavaScript sprintf implementation",
+  "version": "1.0.3",
+  "main": "src/sprintf.js",
+  "license": "BSD-3-Clause-Clear",
+  "keywords": ["sprintf", "string", "formatting"],
+  "authors": ["Alexandru Marasteanu <hello@alexei.ro> (http://alexei.ro/)"],
+  "homepage": "https://github.com/alexei/sprintf.js",
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/alexei/sprintf.js.git"
+  }
+}