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/Header.tsx

@@ -46,7 +46,7 @@ export function Header() {
                 to="/nodes"
                 className="text-base/7 tracking-tight text-gray-700 hover:text-cyan-500 transition-colors"
               >
-                Node
+                Nodes
               </Link>
             </div>
           </div>
@@ -135,7 +135,7 @@ export function Header() {
                   className="-mx-3 block rounded-lg px-3 py-2 text-base font-semibold leading-7 text-gray-900 hover:bg-gray-50"
                   onClick={() => setMobileMenuOpen(false)}
                 >
-                  Node
+                  Nodes
                 </Link>
               </div>
               <div className="py-6">