chore(components): prepare file for Button, Loader, Modal components

Author: Valik3201

src/components/Button.jsx

@@ -0,0 +1,9 @@
+import { Spinner } from 'react-bootstrap';
+
+export const Loader = () => {
+  return (
+    <Spinner animation="border" role="status" variant="primary">
+      <span className="visually-hidden">Loading...</span>
+    </Spinner>
+  );
+};