feat: add Vercel integration for project deployment

This commit introduces Vercel integration, enabling users to deploy projects directly to Vercel. It includes:
- New Vercel types and store for managing connections and stats.
- A VercelConnection component for managing Vercel account connections.
- A VercelDeploymentLink component for displaying deployment links.
- API routes for handling Vercel deployments.
- Updates to the HeaderActionButtons component to support Vercel deployment.

The integration allows users to connect their Vercel accounts, view project stats, and deploy projects with ease.

app/components/chat/NetlifyDeploymentLink.client.tsx

@@ -30,10 +30,10 @@ export function NetlifyDeploymentLink() {
             rel="noopener noreferrer"
             className="inline-flex items-center justify-center w-8 h-8 rounded hover:bg-bolt-elements-item-backgroundActive text-bolt-elements-textSecondary hover:text-[#00AD9F] z-50"
             onClick={(e) => {
-              e.stopPropagation(); // Add this to prevent click from bubbling up
+              e.stopPropagation(); // This is to prevent click from bubbling up
             }}
           >
-            <div className="i-ph:rocket-launch w-5 h-5" />
+            <div className="i-ph:link w-4 h-4 hover:text-blue-400" />
           </a>
         </Tooltip.Trigger>
         <Tooltip.Portal>