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/client/index.d.ts

@@ -0,0 +1,24 @@
+import '../build/polyfills/polyfill-module';
+import type Router from '../shared/lib/router/router';
+import type { MittEmitter } from '../shared/lib/mitt';
+import type { NEXT_DATA } from '../shared/lib/utils';
+declare global {
+    interface Window {
+        __NEXT_HYDRATED?: boolean;
+        __NEXT_HYDRATED_AT?: number;
+        __NEXT_HYDRATED_CB?: () => void;
+        __NEXT_DATA__: NEXT_DATA;
+        __NEXT_P: any[];
+    }
+}
+export declare const version: string | undefined;
+export declare let router: Router;
+export declare const emitter: MittEmitter<string>;
+export declare function initialize(opts?: {
+    devClient?: any;
+}): Promise<{
+    assetPrefix: string;
+}>;
+export declare function hydrate(opts?: {
+    beforeRender?: () => Promise<void>;
+}): Promise<void>;