Implement feedback section for user onboarding list (#9090)

res/css/views/user-onboarding/_UserOnboardingFeedback.pcss

@@ -0,0 +1,41 @@
+/*
+Copyright 2022 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+.mx_UserOnboardingFeedback {
+    display: flex;
+    flex-direction: row;
+    padding: $spacing-32;
+    border-radius: 8px;
+    background: $system;
+    gap: $spacing-64;
+
+    .mx_UserOnboardingFeedback_content {
+        display: flex;
+        flex-direction: column;
+        margin-right: auto;
+        gap: 6px;
+
+        .mx_UserOnboardingFeedback_text {
+            color: $secondary-content;
+        }
+    }
+
+    .mx_UserOnboardingFeedback_action.mx_AccessibleButton {
+        background: transparent;
+        min-width: 180px;
+        align-self: center;
+    }
+}