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/after-context.d.ts

@@ -0,0 +1,21 @@
+import type { RequestLifecycleOpts } from '../base-server';
+import type { AfterTask } from './after';
+export type AfterContextOpts = {
+    waitUntil: RequestLifecycleOpts['waitUntil'] | undefined;
+    onClose: RequestLifecycleOpts['onClose'];
+    onTaskError: RequestLifecycleOpts['onAfterTaskError'] | undefined;
+};
+export declare class AfterContext {
+    private waitUntil;
+    private onClose;
+    private onTaskError;
+    private runCallbacksOnClosePromise;
+    private callbackQueue;
+    private workUnitStores;
+    constructor({ waitUntil, onClose, onTaskError }: AfterContextOpts);
+    after(task: AfterTask): void;
+    private addCallback;
+    private runCallbacksOnClose;
+    private runCallbacks;
+    private reportTaskError;
+}