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/components/unstable-rethrow.d.ts

@@ -0,0 +1,8 @@
+/**
+ * This function should be used to rethrow internal Next.js errors so that they can be handled by the framework.
+ * When wrapping an API that uses errors to interrupt control flow, you should use this function before you do any error handling.
+ * This function will rethrow the error if it is a Next.js error so it can be handled, otherwise it will do nothing.
+ *
+ * Read more: [Next.js Docs: `unstable_rethrow`](https://nextjs.org/docs/app/api-reference/functions/unstable_rethrow)
+ */
+export declare const unstable_rethrow: typeof import("./unstable-rethrow.server").unstable_rethrow;