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/readonly-url-search-params.d.ts

@@ -0,0 +1,19 @@
+/**
+ * ReadonlyURLSearchParams implementation shared between client and server.
+ * This file is intentionally not marked as 'use client' or 'use server'
+ * so it can be imported by both environments.
+ */
+/**
+ * A read-only version of URLSearchParams that throws errors when mutation methods are called.
+ * This ensures that the URLSearchParams returned by useSearchParams() cannot be mutated.
+ */
+export declare class ReadonlyURLSearchParams extends URLSearchParams {
+    /** @deprecated Method unavailable on `ReadonlyURLSearchParams`. Read more: https://nextjs.org/docs/app/api-reference/functions/use-search-params#updating-searchparams */
+    append(): void;
+    /** @deprecated Method unavailable on `ReadonlyURLSearchParams`. Read more: https://nextjs.org/docs/app/api-reference/functions/use-search-params#updating-searchparams */
+    delete(): void;
+    /** @deprecated Method unavailable on `ReadonlyURLSearchParams`. Read more: https://nextjs.org/docs/app/api-reference/functions/use-search-params#updating-searchparams */
+    set(): void;
+    /** @deprecated Method unavailable on `ReadonlyURLSearchParams`. Read more: https://nextjs.org/docs/app/api-reference/functions/use-search-params#updating-searchparams */
+    sort(): void;
+}