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/build/load-jsconfig.d.ts

@@ -0,0 +1,15 @@
+import type { NextConfigComplete } from '../server/config-shared';
+export declare function parseJsonFile(filePath: string): any;
+export type ResolvedBaseUrl = {
+    baseUrl: string;
+    isImplicit: boolean;
+} | undefined;
+export type JsConfig = {
+    compilerOptions: Record<string, any>;
+} | undefined;
+export default function loadJsConfig(dir: string, config: NextConfigComplete): Promise<{
+    useTypeScript: boolean;
+    jsConfig: JsConfig;
+    jsConfigPath?: string;
+    resolvedBaseUrl: ResolvedBaseUrl;
+}>;