Read only fields displayed/hidden in portal

For component schema definitions, a property with a "readOnly": true flag.

The property is not being displayed when showing the definition of that component in the portal, it should be displayed.

The property is being included in the example JSON request body in the portal, it should not be included.

Start by reproducing the portal behavior with a component schema property marked "readOnly": true, then trace the code paths that render the component definition and generate the example JSON request body. Done means the read-only property appears in the definition while being omitted from the request example; the payload does not name specific files or tests.

Written by the indexing model from the issue text.