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/build/turbopack-analyze/index.d.ts

@@ -0,0 +1,13 @@
+import type { NextConfigComplete } from '../../server/config-shared';
+export type AnalyzeContext = {
+    config: NextConfigComplete;
+    distDir: string;
+    dir: string;
+    noMangling: boolean;
+    appDirOnly: boolean;
+};
+export declare function turbopackAnalyze(analyzeContext: AnalyzeContext): Promise<{
+    duration: number;
+    shutdownPromise: Promise<void>;
+}>;
+export declare function waitForShutdown(): Promise<void>;