5622 add a syncemail onboarding step (#5689)

- add sync email onboarding step
- refactor calendar and email visibility enums
- add a new table `keyValuePair` in `core` schema
- add a new resolved boolean field `skipSyncEmail` in current user




https://github.com/twentyhq/twenty/assets/29927851/de791475-5bfe-47f9-8e90-76c349fba56f

packages/twenty-front/src/modules/onboarding/graphql/mutations/skipSyncEmailOnboardingStep.ts

@@ -0,0 +1,9 @@
+import { gql } from '@apollo/client';
+
+export const SKIP_SYNC_EMAIL_ONBOARDING_STEP = gql`
+  mutation SkipSyncEmailOnboardingStep {
+    skipSyncEmailOnboardingStep {
+      success
+    }
+  }
+`;