feat(bookings): add payment and document upload to confirmation page

Allow users to select payment method and upload receipts before confirming.
Add public API endpoints for payment updates and document management.

server/api/public/bookings/[token].get.ts

@@ -3,7 +3,7 @@ import { getBookingByConfirmationToken } from '../../../utils/booking-repository
 
 export default defineEventHandler(async (event) => {
   const token = getRequiredRouteParam(event, 'token', 'Confirmation token')
-  const booking = await getBookingByConfirmationToken(token)
+  const booking = await getBookingByConfirmationToken(token, { includeTransactionDocument: true })
 
   if (!booking) {
     httpError(404, 'Booking not found')