Add Svelte to Quickstart section in AppKit overview

- Add Svelte card to the Quickstart CardGroup alongside other frameworks
- Links to ./svelte/core/installation page
- Follows same format as existing framework cards
- Addresses request from rohit@reown.com to include Svelte in overview

Co-Authored-By: rohit@reown.com <rrohitramesh710@gmail.com>

Author: devin-ai-integration[bot]

appkit/overview.mdx

@@ -33,6 +33,10 @@ Reown AppKit is open-source and free to use, which provides flexibility, transpa
     Get started with AppKit in Vue.
   </Card>
 
+  <Card title="Svelte" icon="svelte" href="./svelte/core/installation">
+    Get started with AppKit in Svelte.
+  </Card>
+
   <Card title="JavaScript" icon="js" href="./javascript/core/installation">
     Get started with AppKit in JavaScript.
   </Card>