Use object for refactor.disabled

For #85160

Using an object is more explict with property names and will let us introduce additional properties in the future if needed

src/vs/workbench/api/common/extHostLanguageFeatures.ts

@@ -389,7 +389,7 @@ class CodeActionAdapter {
 						edit: candidate.edit && typeConvert.WorkspaceEdit.from(candidate.edit),
 						kind: candidate.kind && candidate.kind.value,
 						isPreferred: candidate.isPreferred,
-						disabled: candidate.disabled
+						disabled: candidate.disabled?.reason
 					});
 				}
 			}