New User Onboarding Task List (#9083)

* Improve type of AccessibleButton to accurately represent available props
* Update analytics events

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

@@ -0,0 +1,35 @@
+/*
+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_UserOnboardingPage {
+    width: 100%;
+    height: 100%;
+
+    align-self: stretch;
+    max-width: 1200px;
+    margin: 0 auto auto;
+
+    display: flex;
+    flex-direction: column;
+    box-sizing: border-box;
+
+    gap: $spacing-64;
+    padding: $spacing-64 100px;
+
+    @media (max-width: 1280px) {
+        padding: $spacing-48 $spacing-32;
+    }
+}