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/app-render/use-flight-response.d.ts

@@ -0,0 +1,17 @@
+import type { BinaryStreamOf } from './app-render';
+import type { Readable } from 'node:stream';
+/**
+ * Render Flight stream.
+ * This is only used for renderToHTML, the Flight response does not need additional wrappers.
+ */
+export declare function getFlightStream<T>(flightStream: Readable | BinaryStreamOf<T>, debugStream: Readable | ReadableStream<Uint8Array> | undefined, debugEndTime: number | undefined, nonce: string | undefined): Promise<T>;
+/**
+ * Creates a ReadableStream provides inline script tag chunks for writing hydration
+ * data to the client outside the React render itself.
+ *
+ * @param flightStream The RSC render stream
+ * @param nonce optionally a nonce used during this particular render
+ * @param formState optionally the formState used with this particular render
+ * @returns a ReadableStream without the complete property. This signifies a lazy ReadableStream
+ */
+export declare function createInlinedDataReadableStream(flightStream: ReadableStream<Uint8Array>, nonce: string | undefined, formState: unknown | null): ReadableStream<Uint8Array>;