add working pro modal n checkout

src/hooks/useCheckout.js

@@ -0,0 +1,20 @@
+import { useState, useEffect } from 'react';
+
+function useCheckout() {
+	const [hasVendorScriptLoaded, setHasVendorScriptLoaded] = useState();
+	useEffect(() => {
+		const script = document.createElement('script');
+		script.src = 'https://app.lemonsqueezy.com/js/lemon.js';
+		script.async = 'true';
+		script.defer = 'true';
+		script.addEventListener('load', () => {
+			window.createLemonSqueezy();
+			setHasVendorScriptLoaded(true);
+		});
+		document.body.appendChild(script);
+	}, []);
+
+	return hasVendorScriptLoaded;
+}
+
+export { useCheckout };