Implement calendar module

src/app/calendar/page.tsx

@@ -0,0 +1,17 @@
+import { CalendarShell } from "@/modules/calendar/components/calendar-shell";
+import { listCalendars, listEvents } from "@/modules/calendar/server/queries";
+
+export default async function CalendarPage() {
+  const now = new Date();
+  const from = new Date(now);
+  from.setMonth(from.getMonth() - 2);
+  const to = new Date(now);
+  to.setMonth(to.getMonth() + 10);
+
+  const [calendars, events] = await Promise.all([
+    listCalendars(),
+    listEvents({ from, to, calendarIds: "all" }),
+  ]);
+
+  return <CalendarShell calendars={calendars} events={events} />;
+}