refactor: rename Node page to Nodes and reorganize network page sections

- Renamed NodePage component and directory to NodesPage/nodes for consistency
- Updated all navigation links from "Node" to "Nodes" across headers and footer
- Replaced anchor tags with React Router Link components for proper SPA navigation
- Reorganized NetworkPage component order and added NetworkPros section
- Converted NetworkUsecases from horizontal slider to responsive grid layout
- Added new use cases for adaptive mesh and compute fabric
- Update

src/components/Footer.tsx

@@ -28,7 +28,7 @@ export function Footer() {
                 Agents
               </Link>
               <Link to="/nodes" className="text-sm text-gray-700 hover:text-cyan-500 transition-colors">
-                Node
+                Nodes
               </Link>
             </nav>
           </div>