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/api-utils/get-cookie-parser.d.ts

@@ -0,0 +1,8 @@
+import type { NextApiRequestCookies } from '.';
+/**
+ * Parse cookies from the `headers` of request
+ * @param req request object
+ */
+export declare function getCookieParser(headers: {
+    [key: string]: string | string[] | null | undefined;
+}): () => NextApiRequestCookies;