Introduce a new starter template for Vite with shadcn/ui integration. The template includes React, TypeScript, and Tailwind, and is added to the STARTER_TEMPLATES list. Additionally, update the styling in StarterTemplates component to better accommodate the new template and add the shadcn.svg icon.
Introduce Expo QR code functionality to allow users to preview their projects on mobile devices. Added a new QR code modal component, integrated it into the chat and preview components, and implemented Expo URL detection in the shell process. This enhances the mobile development workflow by providing a seamless way to test Expo projects directly on devices.
- Clean up and consolidate Preview icon buttons while removing redundant ones.
- Reduce gap between elements in BaseChat component from `gap-4` to `gap-2`
- Remove bottom margin from AssistantMessage component for cleaner layout
- Add expo.svg icon to the icons directory for future use
