add notice and link regarding Minnesota

Author: fabiosantoscode

src/theme/Navbar/index.js

@@ -0,0 +1,21 @@
+import React from 'react';
+import NavbarLayout from '@theme-original/Navbar/Layout';
+import NavbarContent from '@theme-original/Navbar/Content';
+import styles from './index.module.css';
+
+export default function Navbar() {
+  return (
+    <>
+      <a href="https://www.standwithminnesota.com/" target="__blank" className={styles.topBar}>
+        <span>
+          <strong>Minnesotans are being repressed by a violent regime</strong>
+          <br />
+          <u>Find out how you can help help!</u>
+        </span>
+      </a>
+      <NavbarLayout>
+        <NavbarContent />
+      </NavbarLayout>
+    </>
+  );
+}

src/theme/Navbar/index.module.css

@@ -0,0 +1,11 @@
+
+.topBar {
+  display: flex;
+  justify-content: center;
+  align-items: center;
+  background-color: #338;
+  height: 6rem;
+  color: white;
+  text-align: center;
+}
+