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/lib/recursive-readdir.d.ts

@@ -0,0 +1,34 @@
+type Filter = (pathname: string) => boolean;
+export type RecursiveReadDirOptions = {
+    /**
+     * Filter to ignore files with absolute pathnames, false to ignore.
+     */
+    pathnameFilter?: Filter;
+    /**
+     * Filter to ignore files and directories with absolute pathnames, false to
+     * ignore.
+     */
+    ignoreFilter?: Filter;
+    /**
+     * Filter to ignore files and directories with the pathname part, false to
+     * ignore.
+     */
+    ignorePartFilter?: Filter;
+    /**
+     * Whether to sort the results, true by default.
+     */
+    sortPathnames?: boolean;
+    /**
+     * Whether to return relative pathnames, true by default.
+     */
+    relativePathnames?: boolean;
+};
+/**
+ * Recursively reads a directory and returns the list of pathnames.
+ *
+ * @param rootDirectory the directory to read
+ * @param options options to control the behavior of the recursive read
+ * @returns the list of pathnames
+ */
+export declare function recursiveReadDir(rootDirectory: string, options?: RecursiveReadDirOptions): Promise<string[]>;
+export {};