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/diagnostics/build-diagnostics.d.ts

@@ -0,0 +1,35 @@
+import type { ExportAppResult } from '../export/types';
+interface BuildDiagnostics {
+    buildStage?: string;
+    buildOptions?: Record<string, string>;
+}
+/**
+ * Saves the exact version of Next.js that was used to build the app to a diagnostics file.
+ */
+export declare function recordFrameworkVersion(version: string): Promise<void>;
+/**
+ * Saves build diagnostics information to a file. This method can be called
+ * multiple times during a build to save additional information that can help
+ * debug a build such as what stage the build was in when a failure happened.
+ * Each time this method is called, the new information will be merged with any
+ * existing build diagnostics that previously existed.
+ */
+export declare function updateBuildDiagnostics(diagnostics: BuildDiagnostics): Promise<void>;
+/**
+ * Writes fetch metrics collected during static generation to a file.
+ */
+export declare function recordFetchMetrics(exportResult: ExportAppResult): Promise<void>;
+interface IncrementalBuildDiagnostics {
+    changedAppPaths?: string[];
+    unchangedAppPaths?: string[];
+    changedPagePaths?: string[];
+    unchangedPagePaths?: string[];
+    changedDependencies?: Record<string, string>;
+    shuttleGitSha?: string;
+    currentGitSha?: string;
+}
+/**
+ * Writes incremental build metrics to a file.
+ */
+export declare function updateIncrementalBuildMetrics(diagnostics: IncrementalBuildDiagnostics): Promise<void>;
+export {};