Blueprints: Backfill themeData from themeZipFile

Follows up on d0cec49 to fix the check in an `if` statement. More context: #1793 introduced a directory resource type and changed the name of a few required parameters. Among others, the `themeZipFile` parameter in the `installTheme`  changed to `themeData`. Unfortunately, the `compile()` function had a type and did not backfill the new required parameter using the older, well known `themeZipFile` parameter which caused Blueprint execution errors.

packages/playground/blueprints/src/lib/compile.ts

@@ -124,7 +124,7 @@ export function compileBlueprint(
 			);
 		} else if (
 			(step as any)?.step === 'installTheme' &&
-			'themeData' in step
+			'themeZipFile' in step
 		) {
 			(step as any).themeData = (step as any).themeZipFile;
 			logger.warn(