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/telemetry/post-telemetry-payload.d.ts

@@ -0,0 +1,16 @@
+interface Payload {
+    meta: {
+        [key: string]: unknown;
+    };
+    context: {
+        anonymousId: string;
+        projectId: string;
+        sessionId: string;
+    };
+    events: Array<{
+        eventName: string;
+        fields: object;
+    }>;
+}
+export declare function postNextTelemetryPayload(payload: Payload, signal?: any): any;
+export {};