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/esm/lib/with-promise-cache.js

@@ -0,0 +1,14 @@
+export function withPromiseCache(cache, fn, getKey) {
+    return (...values)=>{
+        const key = getKey ? getKey(...values) : values[0];
+        let p = cache.get(key);
+        if (!p) {
+            p = fn(...values);
+            p.catch(()=>cache.remove(key));
+            cache.set(key, p);
+        }
+        return p;
+    };
+}
+
+//# sourceMappingURL=with-promise-cache.js.map