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/use-cache/use-cache-wrapper.d.ts

@@ -0,0 +1,14 @@
+import { type SearchParams } from '../request/search-params';
+import type { Params } from '../request/params';
+export interface UseCachePageProps {
+    params: Promise<Params>;
+    searchParams: Promise<SearchParams>;
+    $$isPage: true;
+}
+export type UseCacheLayoutProps = {
+    params: Promise<Params>;
+    $$isLayout: true;
+} & {
+    [slot: string]: any;
+};
+export declare function cache(kind: string, id: string, boundArgsLength: number, originalFn: (...args: unknown[]) => Promise<unknown>, argsObj: IArguments): Promise<unknown>;