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/server/after/run-with-after.d.ts

@@ -0,0 +1,14 @@
+import type { AfterContextOpts } from './after-context';
+type Ctx = {
+    waitUntil: NonNullable<AfterContextOpts['waitUntil']>;
+    onClose: NonNullable<AfterContextOpts['onClose']>;
+    onTaskError: NonNullable<AfterContextOpts['onTaskError']>;
+};
+export declare class AfterRunner {
+    private awaiter;
+    private closeController;
+    private finishedWithoutErrors;
+    readonly context: Ctx;
+    executeAfter(): Promise<void>;
+}
+export {};