feat: warn react-native

Author: loks0n

templates/react-native/src/client.ts.twig

@@ -390,6 +390,11 @@ class Client {
             let data = null;
             const response = await fetch(url.toString(), options);
 
+            const warnings = response.headers.get('x-{{ spec.title | lower }}-warning');
+            if (warnings) {
+                warnings.split(';').forEach((warning: string) => console.warn(warning));
+            }
+
             if (response.headers.get('content-type')?.includes('application/json')) {
                 data = await response.json();
             } else {