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-build.d.ts

@@ -0,0 +1,21 @@
+#!/usr/bin/env node
+import '../server/lib/cpu-profile';
+export type NextBuildOptions = {
+    experimentalAnalyze?: boolean;
+    debug?: boolean;
+    debugPrerender?: boolean;
+    profile?: boolean;
+    mangling: boolean;
+    turbo?: boolean;
+    turbopack?: boolean;
+    webpack?: boolean;
+    experimentalDebugMemoryUsage: boolean;
+    experimentalAppOnly?: boolean;
+    experimentalTurbo?: boolean;
+    experimentalBuildMode: 'default' | 'compile' | 'generate' | 'generate-env';
+    experimentalUploadTrace?: string;
+    experimentalNextConfigStripTypes?: boolean;
+    debugBuildPaths?: string;
+};
+declare const nextBuild: (options: NextBuildOptions, directory?: string) => Promise<void>;
+export { nextBuild };