refactor: remove unused audience images and add Media Kit page route

- Deleted 8 audience images from public/images/audience/ directory (1.jpg through 8.jpg)
- Deleted 8 audience images from public/images/audiences/ directory (1.jpg through 8.jpg)
- Added lazy-loaded MediaPage route at /mediakit path in App.tsx
- Added Media Kit navigation link to Footer component with hover styling

src/App.tsx

@@ -12,6 +12,7 @@ const StoragePage = lazy(() => import('./pages/storage/StoragePage'));
 const GpuPage = lazy(() => import('./pages/gpu/GpuPage'));
 const PodsPage = lazy(() => import('./pages/pods/PodsPage'));
 const NodesPage = lazy(() => import('./pages/nodes/NodesPage'));
+const MediaPage = lazy(() => import('./pages/mediakit/MediaPage'));
 
 function ScrollToTop() {
   const { pathname, hash } = useLocation();
@@ -49,6 +50,7 @@ function App() {
                         <Route path="gpu" element={<GpuPage />} />
             <Route path="pods" element={<PodsPage />} />
             <Route path="nodes" element={<NodesPage />} />
+            <Route path="mediakit" element={<MediaPage />} />
           </Route>
         </Routes>
       </Suspense>