Show a loading bar when checkout is happening (#249)

src/styles/globals.css

@@ -280,3 +280,16 @@
     width: 0;
   }
 }
+
+@keyframes marquee {
+  0% {
+    transform: translateX(-100%);
+  }
+  100% {
+    transform: translateX(200%);
+  }
+}
+
+.animate-marquee {
+  animation: marquee 2s linear infinite;
+}