Feat: Add reasoning summary and tool details display for AI responses (#14414)

Closes [#1405](https://github.com/twentyhq/core-team-issues/issues/1405)

### Implemented Features
- Reasoning Summary: Collapsible display of AI thinking process with
real-time streaming
- Tool Execution: Detailed tool call rendering with expandable results
and loading states
- Error Handling: Clean error stream event display with proper
formatting


### Demo



https://github.com/user-attachments/assets/76ad29b7-d831-4bc8-a115-ad25f7ace6e2

<img width="504" height="819" alt="Screenshot 2025-09-12 at 3 23 39 AM"
src="https://github.com/user-attachments/assets/82dc177d-f009-4e8a-8901-ee1a49201984"
/>

---------

Co-authored-by: Félix Malfait <felix@twenty.com>

packages/twenty-server/src/modules/workflow/workflow-tools/services/workflow-tool.workspace-service.ts

@@ -137,18 +137,21 @@ This is the most efficient way for AI to create workflows as it handles all the
           }
 
           return {
-            workflowId,
-            workflowVersionId,
-            name: parameters.name,
-            trigger: parameters.trigger,
-            steps: parameters.steps,
+            success: true,
             message: `Workflow "${parameters.name}" created successfully with ${parameters.steps.length} steps`,
+            result: {
+              workflowId,
+              workflowVersionId,
+              name: parameters.name,
+              trigger: parameters.trigger,
+              steps: parameters.steps,
+            },
           };
         } catch (error) {
           return {
             success: false,
-            error: error.message,
             message: `Failed to create workflow "${parameters.name}": ${error.message}`,
+            error: error.message,
           };
         }
       },