Allow json in workflow run's error field (#12762)

We can now inspect errors even if they contain complex data as objects.
Only the first line of the error is put in red.



![CleanShot 2025-06-20 at 18 31
54@2x](https://github.com/user-attachments/assets/a3fd41fb-0063-4fe1-8185-54137c2a0d6e)


![image](https://github.com/user-attachments/assets/833a2851-e7d5-4985-9e42-07a1899cd3de)

packages/twenty-front/src/modules/workflow/workflow-steps/components/WorkflowRunStepOutputDetail.tsx

@@ -67,7 +67,13 @@ export const WorkflowRunStepOutputDetail = ({ stepId }: { stepId: string }) => {
       ? getTriggerHeaderType(stepDefinition.definition)
       : i18n._(getActionHeaderTypeOrThrow(stepDefinition.definition.type));
 
-  const setRedHighlightingForEveryNode: GetJsonNodeHighlighting = () => 'red';
+  const setRedHighlightingForEveryNode: GetJsonNodeHighlighting = (keyPath) => {
+    if (keyPath === 'error') {
+      return 'red';
+    }
+
+    return undefined;
+  };
 
   return (
     <>