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/build/webpack/utils.d.ts

@@ -0,0 +1,11 @@
+import type { Compilation, Chunk, ChunkGroup, Module, ModuleGraph, Compiler } from 'webpack';
+import type { ModuleGraphConnection } from 'webpack';
+import type { Span } from '../../trace';
+export declare function traverseModules(compilation: Compilation, callback: (mod: any, chunk: Chunk, chunkGroup: (typeof compilation.chunkGroups)[0], modId: string | null) => any, filterChunkGroup?: (chunkGroup: ChunkGroup) => boolean): void;
+export declare function forEachEntryModule(compilation: any, callback: ({ name, entryModule }: {
+    name: string;
+    entryModule: any;
+}) => void): void;
+export declare function formatBarrelOptimizedResource(resource: string, matchResource: string): string;
+export declare function getModuleReferencesInOrder(module: Module, moduleGraph: ModuleGraph): ModuleGraphConnection[];
+export declare function getCompilationSpan(compilation: Compiler | Compilation): Span | undefined;