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/browserslist/error.js

@@ -0,0 +1,12 @@
+function BrowserslistError(message) {
+  this.name = 'BrowserslistError'
+  this.message = message
+  this.browserslist = true
+  if (Error.captureStackTrace) {
+    Error.captureStackTrace(this, BrowserslistError)
+  }
+}
+
+BrowserslistError.prototype = Error.prototype
+
+module.exports = BrowserslistError