Add customisation point for visibility of invites and room creation

Fixes https://github.com/vector-im/element-web/issues/19331

src/customisations/helpers/UIComponents.ts

@@ -0,0 +1,22 @@
+/*
+Copyright 2021 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.
+*/
+
+import { UIComponent } from "../../settings/UIFeature";
+import { ComponentVisibilityCustomisations } from "../ComponentVisibility";
+
+export function shouldShowComponent(component: UIComponent): boolean {
+    return ComponentVisibilityCustomisations.shouldShowComponent?.(component) ?? true;
+}