feat: implement public booking cancellation feature

- Added cancelPublicBooking handler to manage booking cancellations.
- Updated public booking service to include cancellation logic.
- Created cancelPublicBooking schema for input validation.
- Modified public booking confirmation page to allow users to cancel their bookings.
- Enhanced email service to send cancellation confirmation emails.
- Made customerEmail field required in booking schemas and updated related components.
- Updated API client to support cancellation requests.
- Added migration to enforce non-nullable customer_email fields in the database.

apps/backend/src/modules/public-booking/public-booking.routes.ts

@@ -1,9 +1,14 @@
+import { cancelPublicBookingHandler } from '@/modules/public-booking/handlers/cancel-public-booking.handler';
 import { createPublicBookingHandler } from '@/modules/public-booking/handlers/create-public-booking.handler';
 import { getPublicBookingConfirmationHandler } from '@/modules/public-booking/handlers/get-public-booking-confirmation.handler';
 import { listPublicAvailabilityHandler } from '@/modules/public-booking/handlers/list-public-availability.handler';
 import type { AppEnv } from '@/types/hono';
 import { zValidator } from '@hono/zod-validator';
-import { createPublicBookingSchema, publicAvailabilityQuerySchema } from '@repo/api-contract';
+import {
+  cancelPublicBookingSchema,
+  createPublicBookingSchema,
+  publicAvailabilityQuerySchema,
+} from '@repo/api-contract';
 import { Hono } from 'hono';
 import { z } from 'zod';
 
@@ -33,3 +38,10 @@ publicBookingRoutes.get(
   zValidator('param', confirmationParamsSchema),
   getPublicBookingConfirmationHandler
 );
+
+publicBookingRoutes.post(
+  '/complex/:complexSlug/cancel',
+  zValidator('param', complexSlugParamsSchema),
+  zValidator('json', cancelPublicBookingSchema),
+  cancelPublicBookingHandler
+);