feat(booking): move event and ticket configuration to database

Replace hardcoded event details and ticket types with dynamic DB records
Add booking-config API endpoint to serve active event settings

server/api/public/booking-config.get.ts

@@ -0,0 +1,5 @@
+import { getPublicBookingConfig } from '../../utils/booking-repository'
+
+export default defineEventHandler(async () => {
+  return await getPublicBookingConfig()
+})