Add variable path (#10720)

<img width="537" alt="Capture d’écran 2025-03-07 à 09 44 21"
src="https://github.com/user-attachments/assets/52c4d292-01af-4389-aa66-551be2358dd7"
/>

- search through step output schema the variable
- build the variable path
- returns the variable label 
- display both

packages/twenty-front/src/testing/decorators/WorkflowStepDecorator.tsx

@@ -1,7 +1,10 @@
+import { usePopulateStepsOutputSchema } from '@/workflow/hooks/usePopulateStepsOutputSchema';
+import { WorkflowVersionComponentInstanceContext } from '@/workflow/states/context/WorkflowVersionComponentInstanceContext';
 import { workflowIdState } from '@/workflow/states/workflowIdState';
+import { WorkflowVersion } from '@/workflow/types/Workflow';
 import { workflowSelectedNodeState } from '@/workflow/workflow-diagram/states/workflowSelectedNodeState';
 import { Decorator } from '@storybook/react';
-import { useEffect } from 'react';
+import { useEffect, useState } from 'react';
 import { useSetRecoilState } from 'recoil';
 import {
   getWorkflowMock,
@@ -11,11 +14,30 @@ import {
 export const WorkflowStepDecorator: Decorator = (Story) => {
   const setWorkflowId = useSetRecoilState(workflowIdState);
   const setWorkflowSelectedNode = useSetRecoilState(workflowSelectedNodeState);
+  const workflowVersion = getWorkflowMock().versions.edges[0]
+    .node as WorkflowVersion;
+  const { populateStepsOutputSchema } = usePopulateStepsOutputSchema({
+    workflowVersionId: workflowVersion.id,
+  });
+  const [ready, setReady] = useState(false);
 
   useEffect(() => {
     setWorkflowId(getWorkflowMock().id);
     setWorkflowSelectedNode(getWorkflowNodeIdMock());
-  }, [setWorkflowId, setWorkflowSelectedNode]);
+    populateStepsOutputSchema(workflowVersion);
+    setReady(true);
+  }, [
+    setWorkflowId,
+    setWorkflowSelectedNode,
+    populateStepsOutputSchema,
+    workflowVersion,
+  ]);
 
-  return <Story />;
+  return (
+    <WorkflowVersionComponentInstanceContext.Provider
+      value={{ instanceId: workflowVersion.id }}
+    >
+      {ready && <Story />}
+    </WorkflowVersionComponentInstanceContext.Provider>
+  );
 };