added migration guide (#5496)

Author: saminacodes

apps/portal/src/app/connect/sidebar.tsx

@@ -179,6 +179,10 @@ export const sidebar: SideBar = {
                 },
               ],
             },
+            {
+              name: "Migrate to thirdweb",
+              href: `${walletSlug}/migrate-to-thirdweb`,
+            },
             {
               name: "FAQ",
               href: `${walletSlug}/faq`,

apps/portal/src/app/connect/wallet/migrate-to-thirdweb/page.mdx

@@ -0,0 +1,11 @@
+import {Callout} from "@doc";
+
+# Migration Guide
+
+Migrating from another embedded wallet provider is possible even if your users have assets and funds on their existing wallets. 
+
+If you are thinking of migrating your users off another embedded wallet provider to thirdweb, please [reach out to us](https://thirdweb.com/contact-us) and we will consult and assist with the process.
+
+<Callout variant="info" title="Learn more">Learn more about Migration from our [GitHub repository](https://github.com/thirdweb-example/migrate)</Callout>
+
+If you’d prefer to use your existing solutions for now and take advantage of thirdweb for other parts of your application, we recommend using the [Connect SDK adapters](/typescript/v5/adapters).