Fix loading indicator

[karrisanthoshigayatri]

Add Loading Indicator for Checkout Order Placement
📌 Problem

When users click on "Place Order" in the checkout page, there is no visual feedback during processing. This can cause confusion and may lead users to click the button multiple times.

✅ Changes Made
Added loading state for the "Place Order" button
Displayed a loading indicator/text while order is being processed
Disabled button during processing to prevent multiple submissions
Restored button state after completion
🎯 Result

Improved user experience by providing clear feedback during order processing and preventing duplicate submissions.

[vercel]

@karrisanthoshigayatri is attempting to deploy a commit to the adithyansubramani1-1657's projects Team on Vercel.

A member of the Team first needs to authorize it.

[karrisanthoshigayatri]

The loading indicator feature has been implemented and tested successfully.

The Vercel check is awaiting authorization because I do not have permission to deploy to the repository owner's Vercel team. This is unrelated to the code changes.

The implementation is complete and ready for review.