Show "undefined" explicitly in addition to not showing a red asterisk

Is your feature request related to a problem?

If you define a component where every field is optional, the UI shows all fields without a red asterisk. This is expected and fine. However, when sharing this schema with other teams who are unfamiliar with this specific format, they may interpret the lack of a red asterisk to mean all fields are required. For example, look at the two screenshots below:

In the first, you would think every property is required since we see string for all of them.

In the second, you realize they are actually all optional except for id since it has a red asterisk.

Describe the solution you'd like

The solution is to show string | undefined for properties that are not required. This would clear up the issue and make it more clear that something is not required. We could also show a ? next to the field name instead of undefined.

Thanks so much!

The issue names no files or tests, so first locate the Swagger UI component that renders schema properties and their required-field indicators. Verify how optional properties are displayed, then make the rendered type explicitly indicate undefined or use a question mark, and confirm the result in the schema view.