remover booker, that's overdosed

It also brings the problem of consolidating bookers over multiple
bookings. The amount of data is not justifying having it in an own
entity

helpers/ical.ts

@@ -21,7 +21,7 @@ export function generateCalendarEntry(booking: Booking): string {
     duration: { days: booking.days.length },
     location: 'Mömpelgardgasse 25, 72348 Rosenfeld, Deutschland',
     geo: { lat: 48.287044, lon: 8.726361 },
-    description: `Gebucht auf ${booking.booker.name}
+    description: `Gebucht auf ${booking.name}
 
 Buchungs-Link: ${getBaseURL()}/booking/${booking.uuid}
 `,
@@ -39,18 +39,27 @@ Buchungs-Link: ${getBaseURL()}/booking/${booking.uuid}
 }
 
 export function generateBookedCalendar(bookings: Booking[]): string {
-  const events = bookings.map((booking): { productId: string; calName: string; start: [number, number, number]; startOutputType: 'local' | 'utc'; duration: { days: number }; title: string; description: string; status: EventStatus } => ({
+  const events = bookings.map((booking): {
+    productId: string
+    calName: string
+    start: [number, number, number]
+    startOutputType: 'local' | 'utc'
+    duration: { days: number }
+    title: string
+    description: string
+    status: EventStatus
+  } => ({
     productId: 'app.vercel.pfadi-bussle/ics',
     calName: 'Pfadi-Bussle Buchungen',
     start: convertDay(booking.days[0]),
     startOutputType: 'local',
     duration: { days: booking.days.length },
-    title: `Buchung ${booking.booker.name}`,
-    description: `Name: ${booking.booker.name}
+    title: `Buchung ${booking.name}`,
+    description: `Name: ${booking.name}
 Zeitraum: ${daysFormatFrontend(booking.days)}
 
-Email: ${booking.booker.email}
-Telefon: ${booking.booker.phone}
+Email: ${booking.email}
+Telefon: ${booking.phone}
 
 Link: ${getBaseURL()}/admin/booking/${booking.uuid}
 `,