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/index.d.ts

@@ -0,0 +1,19 @@
+/// <reference types="./types/global" />
+/// <reference types="./types/compiled" />
+/// <reference path="./dist/styled-jsx/types/index.d.ts" />
+/// <reference path="./app.d.ts" />
+/// <reference path="./cache.d.ts" />
+/// <reference path="./document.d.ts" />
+/// <reference path="./dynamic.d.ts" />
+/// <reference path="./error.d.ts" />
+/// <reference path="./head.d.ts" />
+/// <reference path="./headers.d.ts" />
+/// <reference path="./image.d.ts" />
+/// <reference path="./link.d.ts" />
+/// <reference path="./navigation.d.ts" />
+/// <reference path="./router.d.ts" />
+/// <reference path="./script.d.ts" />
+/// <reference path="./server.d.ts" />
+
+export { default } from './types'
+export * from './types'