feat(workflow-form): run the workflow from the form and show the author's instruction #8023

Task Summary

Run the workflow from the Form View, and show the author's instruction above the inputs.\n\n- Run/Stop button reusing the operator canvas run-button state machine (Connect/Connecting, Invalid/Empty, Run/Stop), plus the computing-unit selector, a run clock, and failure messages that collapse opaque traces to one plain sentence.\n- An optional author instruction (markdown), rendered above the inputs in a collapsible panel.

Task Type

• Refactor / Cleanup
• DevOps / Deployment / CI
• Testing / QA
• Documentation
• Performance
• Other