Add payload plugin for ClientSchedule

Add plugin to serialise ClientSchedule objects as JSON when it's passed
from the server to client on SSR requests.

plugins/schedule-payload-type.ts

@@ -0,0 +1,25 @@
+import { Info } from "~/shared/utils/luxon";
+
+export default definePayloadPlugin(() => {
+	definePayloadReducer(
+		"ClientSchedule",
+		data => {
+			if (!(data instanceof ClientSchedule)) {
+				return;
+			}
+			const accountStore = useAccountStore();
+			return {
+				timezone: accountStore.activeTimezone,
+				locale: accountStore.activeLocale,
+				api: data.toApi(false)
+			};
+		},
+	);
+	definePayloadReviver(
+		"ClientSchedule",
+		({ timezone, locale, api }) => {
+			const zone = Info.normalizeZone(timezone);
+			return ClientSchedule.fromApi(api, { zone, locale })
+		},
+	);
+});