Replace less with scss, add homepage widgets, add registrars selector and registrars page (#2114)

* Replace less compiler with scss

* Replace less with scss, add homepage widgets, add registrars selector and registrars page

console-webapp/src/app/settings/users/users.component.scss

@@ -0,0 +1,13 @@
+// Copyright 2023 The Nomulus Authors. All Rights Reserved.
+//
+// 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.