Added post component for events

This needs RLS disabled, will work on that later, I don't like postgre

models/CalendarEvent.ts

@@ -1,8 +1,9 @@
+import { z } from 'zod'
 import type { Category } from './Category'
-import type { RPGDate } from './Date'
+import { dateSchema, type RPGDate } from './Date'
 
 export interface CalendarEvent {
-  id: number
+  id?: number
   title: string
   startDate: RPGDate
   endDate?: RPGDate
@@ -13,6 +14,19 @@ export interface CalendarEvent {
   wiki?: string
 }
 
+/**
+ * Body validation schema for post requests (insert and update)
+ */
+export const postEventBodySchema = z.object({
+  event: z.object({
+    title: z.string(),
+    description: z.string().optional(),
+    startDate: dateSchema.required(),
+    endDate: dateSchema.optional()
+  }),
+  calendarId: z.number().int().positive()
+})
+
 // eslint-disable-next-line @typescript-eslint/no-explicit-any
 export function isCalendarEvent(object: any): object is CalendarEvent {
   return 'startDate' in object