feat(checkout): add checkout page with contact details and place order

[Aniketpolkar]

Overview

Adds a checkout page to place orders with contact details (no payment integration yet).

Changes

• Checkout form collects: Name, Email, Phone, Address.
• Place Order button confirms order and clears the cart.
• Order data temporarily stored in localStorage.
• Confirmation message displayed after placing order.

Testing

• Filled checkout form and placed an order; cart cleared and confirmation shown.
• Form validation for required fields.
• Responsive design for mobile and desktop.

Notes

• Backend order storage to be implemented in future updates.

Closes #3

[vercel]

@Aniketpolkar is attempting to deploy a commit to the Tejas Pokale's projects Team on Vercel.

A member of the Team first needs to authorize it.

[tejaspokale22]

Woking perfectly!!!