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/app-render/create-component-styles-and-scripts.d.ts

@@ -0,0 +1,8 @@
+import type { AppRenderContext } from './app-render';
+export declare function createComponentStylesAndScripts({ filePath, getComponent, injectedCSS, injectedJS, ctx, }: {
+    filePath: string;
+    getComponent: () => any;
+    injectedCSS: Set<string>;
+    injectedJS: Set<string>;
+    ctx: AppRenderContext;
+}): Promise<[React.ComponentType<any>, React.ReactNode, React.ReactNode]>;