mv ONBOARDING_INTRODUCED_AT to new file (#557)

otherwise will the `/event-types`-route probably unnecessarily import the whole `getting_started`-page

lib/getting-started.tsx

@@ -0,0 +1,3 @@
+import dayjs from "dayjs";
+
+export const ONBOARDING_INTRODUCED_AT = dayjs("September 1 2021").toISOString();

pages/event-types/index.tsx

@@ -24,7 +24,7 @@ import prisma from "@lib/prisma";
 import { GetServerSidePropsContext, InferGetServerSidePropsType } from "next";
 import { useMutation } from "react-query";
 import createEventType from "@lib/mutations/event-types/create-event-type";
-import { ONBOARDING_INTRODUCED_AT } from "../getting-started";
+import { ONBOARDING_INTRODUCED_AT } from "@lib/getting-started";
 
 const EventTypesPage = (props: InferGetServerSidePropsType<typeof getServerSideProps>) => {
   const { user, types } = props;

pages/getting-started.tsx

@@ -50,8 +50,6 @@ const DEFAULT_EVENT_TYPES = [
   },
 ];
 
-export const ONBOARDING_INTRODUCED_AT = dayjs("September 1 2021").toISOString();
-
 type OnboardingProps = {
   user: User;
   integrations?: Record<string, string>[];