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/lib/error-telemetry-utils.d.ts

@@ -0,0 +1,10 @@
+/**
+ * Augments the digest field of errors thrown in React Server Components (RSC) with an error code.
+ * Since RSC errors can only be serialized through the digest field, this provides a way to include
+ * an additional error code that can be extracted client-side via `extractNextErrorCode`.
+ *
+ * The error code is appended to the digest string with a semicolon separator, allowing it to be
+ * parsed out later while preserving the original digest value.
+ */
+export declare const createDigestWithErrorCode: (thrownValue: unknown, originalDigest: string) => string;
+export declare const extractNextErrorCode: (error: unknown) => string | undefined;