4971 add issyncenabled toggle in messaging settings (#4995)

- Closes #4971
- Fix calendar import to take isSyncEnabled into account

packages/twenty-front/src/modules/accounts/types/MessageChannel.ts

@@ -4,6 +4,6 @@ export type MessageChannel = {
   id: string;
   handle: string;
   isContactAutoCreationEnabled?: boolean;
-  isSynced?: boolean;
+  isSyncEnabled: boolean;
   visibility: InboxSettingsVisibilityValue;
 };