feat(workflow-form): open a step to inspect its settings read-only

[yangzhang75]

Task Summary

Let a reader inspect how a step is configured, without changing it.

• selecting an operator in the preview opens that operator's settings in a read-only inspect panel within the form

Task Type

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

[yangzhang75]

/parent-issue: #8011

[yangzhang75]

/take