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/server-reference-info.d.ts

@@ -0,0 +1,31 @@
+export interface ServerReferenceInfo {
+    type: 'server-action' | 'use-cache';
+    usedArgs: [boolean, boolean, boolean, boolean, boolean, boolean];
+    hasRestArgs: boolean;
+}
+/**
+ * Extracts info about the server reference for the given server reference ID by
+ * parsing the first byte of the hex-encoded ID.
+ *
+ * ```
+ * Bit positions: [7]      [6] [5] [4] [3] [2] [1]  [0]
+ * Bits:          typeBit  argMask                  restArgs
+ * ```
+ *
+ * If the `typeBit` is `1` the server reference represents a `"use cache"`
+ * function, otherwise a server action.
+ *
+ * The `argMask` encodes whether the function uses the argument at the
+ * respective position.
+ *
+ * The `restArgs` bit indicates whether the function uses a rest parameter. It's
+ * also set to 1 if the function has more than 6 args.
+ *
+ * @param id hex-encoded server reference ID
+ */
+export declare function extractInfoFromServerReferenceId(id: string): ServerReferenceInfo;
+/**
+ * Creates a sparse array containing only the used arguments based on the
+ * provided action info.
+ */
+export declare function omitUnusedArgs(args: unknown[], info: ServerReferenceInfo): unknown[];