Add react loading component

src/components/loading/Loading.tsx

@@ -0,0 +1,17 @@
+import React, { FunctionComponent, useEffect } from 'react';
+
+import loading from './loading';
+
+const Loading: FunctionComponent = () => {
+    useEffect(() => {
+        loading.show();
+
+        return () => {
+            loading.hide();
+        };
+    }, []);
+
+    return <></>;
+};
+
+export default Loading;