Introduce a new feature flag for contact creation (#5570)

Introduce new feature flag
`IS_CONTACT_CREATION_FOR_SENT_AND_RECEIVED_EMAILS_ENABLED` to allow
contacts to be created for sent and received emails.

packages/twenty-server/src/engine/workspace-manager/workspace-sync-metadata/commands/add-standard-id.command.ts

@@ -60,6 +60,7 @@ export class AddStandardIdCommand extends CommandRunner {
             IS_STRIPE_INTEGRATION_ENABLED: false,
             IS_GMAIL_SYNC_V2_ENABLED: true,
             IS_LINKS_FIELD_ENABLED: true,
+            IS_CONTACT_CREATION_FOR_SENT_AND_RECEIVED_EMAILS_ENABLED: true,
           },
         );
       const standardFieldMetadataCollection = this.standardFieldFactory.create(
@@ -76,6 +77,7 @@ export class AddStandardIdCommand extends CommandRunner {
           IS_STRIPE_INTEGRATION_ENABLED: false,
           IS_GMAIL_SYNC_V2_ENABLED: true,
           IS_LINKS_FIELD_ENABLED: true,
+          IS_CONTACT_CREATION_FOR_SENT_AND_RECEIVED_EMAILS_ENABLED: true,
         },
       );