Added installing cocoapods to script for creating apps (#1955)

Author: alexChernyatiev

Examples/create-app.js

@@ -41,6 +41,18 @@ try {
     process.exit();
 }
 
+if (!isReactNativeVersionLowerThan(60) && process.platform === "darwin") {
+    try {
+        console.log("Verify that CocoaPods installed");
+        execCommand("pod --version");
+        console.log("CocoaPods has installed");
+    } catch {
+        console.error(`'CocoaPods' are required to run the script, you can install it with\n'sudo gem install cocoapods'\ncommand
+        `);
+        process.exit();
+    }
+}
+
 const appNameAndroid = `${appName}-android`;
 const appNameIOS = `${appName}-ios`;
 let owner = null;