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/with-router.d.ts

@@ -0,0 +1,8 @@
+import React from 'react';
+import type { BaseContext, NextComponentType, NextPageContext } from '../shared/lib/utils';
+import type { NextRouter } from './router';
+export type WithRouterProps = {
+    router: NextRouter;
+};
+export type ExcludeRouterProps<P> = Pick<P, Exclude<keyof P, keyof WithRouterProps>>;
+export default function withRouter<P extends WithRouterProps, C extends BaseContext = NextPageContext>(ComposedComponent: NextComponentType<C, any, P>): React.ComponentType<ExcludeRouterProps<P>>;