Add trends UI with admin and user settings (#11502)

app/javascript/mastodon/features/getting_started/containers/trends_container.js

@@ -0,0 +1,13 @@
+import { connect } from 'react-redux';
+import { fetchTrends } from '../../../actions/trends';
+import Trends from '../components/trends';
+
+const mapStateToProps = state => ({
+  trends: state.getIn(['trends', 'items']),
+});
+
+const mapDispatchToProps = dispatch => ({
+  fetchTrends: () => dispatch(fetchTrends()),
+});
+
+export default connect(mapStateToProps, mapDispatchToProps)(Trends);