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/load-default-error-components.d.ts

@@ -0,0 +1,12 @@
+import { type LoadComponentsReturnType } from './load-components';
+export type ManifestItem = {
+    id: number | string;
+    files: string[];
+};
+export type ReactLoadableManifest = {
+    [moduleId: string]: ManifestItem;
+};
+export type ErrorModule = typeof import('./route-modules/pages/builtin/_error');
+declare function loadDefaultErrorComponentsImpl(distDir: string): Promise<LoadComponentsReturnType<ErrorModule>>;
+export declare const loadDefaultErrorComponents: typeof loadDefaultErrorComponentsImpl;
+export {};