add some UI for prompt improval [sic] (#3974)

skyvern-frontend/src/routes/workflows/editor/nodes/Taskv2Node/Taskv2Node.tsx

@@ -107,6 +107,7 @@ function Taskv2Node({ id, data, type }: NodeProps<Taskv2Node>) {
                 ) : null}
               </div>
               <WorkflowBlockInputTextarea
+                aiImprove={{ useCase: "task_v2_prompt" }}
                 nodeId={id}
                 onChange={(value) => {
                   update({ prompt: value });

skyvern-frontend/src/routes/workflows/types/workflowTypes.ts

@@ -584,3 +584,9 @@ export function isOutputParameter(
 ): parameter is OutputParameter {
   return parameter.parameter_type === "output";
 }
+
+export type ImprovePromptForWorkflowResponse = {
+  error: string | null;
+  improved: string;
+  original: string;
+};