feat(orchestrator): Add object type support in ui:props

[lokanandaprabhu]

Hey, I just made a Pull Request!

Fixes: https://issues.redhat.com/browse/RHIDP-11054

Add object type support in ui:props for fetch:response:* properties (RHIDP-11054)

Type System Enhancement:

• Updated UiProps type to accept JsonValue instead of string for fetch:response:* properties
• Enables using objects, arrays, and other JSON types in ui:props, not just strings
• Maintains full backward compatibility with existing string-based selectors

Runtime Safety:

• Added runtime validation in useTemplateUnitEvaluator to ensure selectors are strings when evaluated as JSONata expressions
• Provides clear error messages when invalid types are used

Documentation:

• Updated orchestratorFormWidgets.md to document object type support
• Added examples showing flexible ui:props configurations

This change allows users to reference object attributes more easily in ui:props while maintaining type safety and backward compatibility.

✔️ Checklist

• A changeset describing the change and affected packages. (more info)
• Added or Updated documentation
• Tests for new functionality and regression tests for bug fixes
• Screenshots attached (for UI changes)

[rhdh-gh-app]

Important

This PR includes changes that affect public-facing API. Please ensure you are adding/updating documentation for new features or behavior.

Changed Packages

Package Name	Package Path	Changeset Bump	Current Version
@red-hat-developer-hub/backstage-plugin-orchestrator-form-widgets	workspaces/orchestrator/plugins/orchestrator-form-widgets	minor	v1.5.0

[sonarqubecloud]

Quality Gate passed

Issues
1 New issue
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud