adds upcoming changes banner to homepage

app/layout/upcoming-changes/component.tsx

@@ -0,0 +1,44 @@
+import { useCallback } from 'react';
+
+import { useCookies } from 'react-cookie';
+
+import { useFeatureFlags } from 'hooks/feature-flags';
+
+import Button from 'components/button';
+import Wrapper from 'layout/wrapper';
+
+export const UpcomingChangesBanner = (): JSX.Element => {
+  const [cookies, setCookie] = useCookies(['upcoming-changes']);
+  const { upcomingChanges } = useFeatureFlags();
+
+  const onAccept = useCallback(() => {
+    setCookie('upcoming-changes', 'true', { path: '/' });
+  }, [setCookie]);
+
+  if (cookies['upcoming-changes'] === 'true' || !upcomingChanges) return null;
+
+  return (
+    <div className="relative z-10 w-full bg-yellow-600">
+      <Wrapper>
+        <div className="flex items-center space-x-5 py-2 text-sm text-gray-800">
+          <p>
+            MaPP is undergoing a transformation with an enhanced interface and new features released
+            by the <span className="font-bold">end of January 2024</span>! Your existing projects
+            will seamlessly transition to the new version. For any concerns, feel free to reach out
+            to us. Stay tuned for a better planning experience!
+          </p>
+          <Button
+            theme="secondary"
+            size="s"
+            className="flex-shrink-0 whitespace-nowrap"
+            onClick={onAccept}
+          >
+            Accept
+          </Button>
+        </div>
+      </Wrapper>
+    </div>
+  );
+};
+
+export default UpcomingChangesBanner;

app/layout/upcoming-changes/index.ts

@@ -0,0 +1 @@
+export { default } from './component';

app/pages/index.tsx

@@ -14,6 +14,7 @@ import PartnersList from 'layout/home/partners';
 import Support from 'layout/home/support';
 import MetaIcons from 'layout/meta-icons';
 import MetaTags from 'layout/meta-tags';
+import UpcomingChanges from 'layout/upcoming-changes';
 
 export const getServerSideProps = withUser();
 
@@ -26,6 +27,8 @@ const Home = (): JSX.Element => {
 
       <MetaIcons />
 
+      <UpcomingChanges />
+
       <MetaTags
         name="Marxan conservation Solutions"
         title="Spatial conservation planning in the cloud"