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-server/src/modules/messaging/common/standard-objects/message-channel.workspace-entity.ts

@@ -41,9 +41,9 @@ export enum MessageChannelSyncStage {
 }
 
 export enum MessageChannelVisibility {
-  METADATA = 'metadata',
-  SUBJECT = 'subject',
-  SHARE_EVERYTHING = 'share_everything',
+  METADATA = 'METADATA',
+  SUBJECT = 'SUBJECT',
+  SHARE_EVERYTHING = 'SHARE_EVERYTHING',
 }
 
 export enum MessageChannelType {