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/request/draft-mode.d.ts

@@ -0,0 +1,9 @@
+import type { DraftModeProvider } from '../async-storage/draft-mode-provider';
+export declare function draftMode(): Promise<DraftMode>;
+declare class DraftMode {
+    constructor(provider: null | DraftModeProvider);
+    get isEnabled(): boolean;
+    enable(): void;
+    disable(): void;
+}
+export {};