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/shared/lib/fnv1a.d.ts

@@ -0,0 +1,13 @@
+declare const FNV_PRIMES: {
+    readonly 32: bigint;
+    readonly 64: bigint;
+    readonly 128: bigint;
+    readonly 256: bigint;
+    readonly 512: bigint;
+    readonly 1024: bigint;
+};
+export default function fnv1a(inputString: string, { size, seed, }?: {
+    size?: keyof typeof FNV_PRIMES;
+    seed?: number;
+}): bigint;
+export {};