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/cli/next-telemetry.d.ts

@@ -0,0 +1,7 @@
+#!/usr/bin/env node
+export type NextTelemetryOptions = {
+    enable?: boolean;
+    disable?: boolean;
+};
+declare const nextTelemetry: (options: NextTelemetryOptions, arg: string) => void;
+export { nextTelemetry };