refactor: update CTA buttons with external links and navigation improvements

- Changed "Deploy a Model" button in agents CallToAction to external link (myceliumcloud.tf) with target="_blank"
- Updated "Host a Node" button path from /host to /nodes in agents and cloud CallToAction
- Changed cloud CallToAction "Start Deploying" button to external link with target="_blank"
- Updated CloudHeroNew buttons to external links for myceliumcloud.tf and docs
- Removed onGetStartedClick handler from CloudHeroNew in

src/pages/cloud/CalltoAction.tsx

@@ -52,13 +52,21 @@ export function CallToAction() {
             {/* ✅ Two cards, stacked center with spacing */}
             <div className="mt-10 flex flex-wrap justify-center gap-x-10 gap-y-8">
               <div className="flex flex-col items-center text-center max-w-xs">
-                <Button to="/host" variant="solid" color="cyan" className="mt-4">
+                <Button to="/nodes" variant="solid" color="cyan" className="mt-4">
                   Host a Node
                 </Button>
               </div>
 
               <div className="flex flex-col items-center text-center max-w-xs">
-                                <Button to="/cloud" variant="outline" color="white" className="mt-4">
+                <Button
+                  as="a"
+                  to="https://myceliumcloud.tf"
+                  variant="outline"
+                  color="white"
+                  className="mt-4"
+                  target="_blank"
+                  rel="noopener noreferrer"
+                >
                   Start Deploying
                 </Button>
               </div>