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/lib/app-info-log.d.ts

@@ -0,0 +1,18 @@
+import { type ConfiguredExperimentalFeature } from '../config';
+export declare function logStartInfo({ networkUrl, appUrl, envInfo, experimentalFeatures, logBundler, cacheComponents, }: {
+    networkUrl: string | null;
+    appUrl: string | null;
+    envInfo?: string[];
+    experimentalFeatures?: ConfiguredExperimentalFeature[];
+    logBundler: boolean;
+    cacheComponents?: boolean;
+}): void;
+export declare function getStartServerInfo({ dir, dev, debugPrerender, }: {
+    dir: string;
+    dev: boolean;
+    debugPrerender?: boolean;
+}): Promise<{
+    envInfo?: string[];
+    experimentalFeatures?: ConfiguredExperimentalFeature[];
+    cacheComponents?: boolean;
+}>;