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/home/CallToAction.tsx

@@ -52,7 +52,7 @@ export function CallToAction() {
             </P>
 
             <div className="mt-10 flex flex-wrap justify-center items-center gap-x-6 gap-y-4">
-              <Button to="/network" variant="solid" color="cyan">
+              <Button to="/network#download" variant="solid" color="cyan">
                 Join the Network
               </Button>