Scaffold filters creation and deletion (#12990)

When the feature flag is activated, we can now create filters and delete
them. This PR mainly updates how we generate workflow diagrams.


https://github.com/user-attachments/assets/1a4aef46-7c3c-45fa-953f-0bd1908b9be7

packages/twenty-server/src/modules/workflow/workflow-builder/workflow-step/workflow-version-step.workspace-service.ts

@@ -576,6 +576,20 @@ export class WorkflowVersionStepWorkspaceService {
           },
         };
       }
+      case WorkflowActionType.FILTER: {
+        return {
+          id: newStepId,
+          name: 'Filter',
+          type: WorkflowActionType.FILTER,
+          valid: false,
+          settings: {
+            ...BASE_STEP_DEFINITION,
+            input: {
+              filter: {},
+            },
+          },
+        };
+      }
       case WorkflowActionType.HTTP_REQUEST: {
         return {
           id: newStepId,