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/next-devtools/server/devtools-config-middleware.d.ts

@@ -0,0 +1,7 @@
+import type { IncomingMessage, ServerResponse } from 'http';
+import type { DevToolsConfig } from '../dev-overlay/shared';
+export declare function devToolsConfigMiddleware({ distDir, sendUpdateSignal, }: {
+    distDir: string;
+    sendUpdateSignal: (data: DevToolsConfig) => void;
+}): (req: IncomingMessage, res: ServerResponse, next: () => void) => Promise<void>;
+export declare function getDevToolsConfig(distDir: string): Promise<DevToolsConfig>;