Move the user view tests from Puppeteer to Cypress (#8787)

* Move the user view tests from Puppeteer to Cypress

* Iterate snapshot test

* Actually import the new module

* Specify widths

* Update cypress & percy

* Try fix percy

* Finish cypress upgrade

* Tidy cypress.config.ts

* Revert "Tidy cypress.config.ts"

This reverts commit d913052cc4.

* Revert "Finish cypress upgrade"

This reverts commit b5aba3b8a3.

* Revert "Update cypress & percy"

This reverts commit f846a364f8.

* delint

* Update percy

cypress/support/percy.ts

@@ -0,0 +1,54 @@
+/*
+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.
+*/
+
+/// <reference types="cypress" />
+import { SnapshotOptions as PercySnapshotOptions } from '@percy/core';
+
+declare global {
+    // eslint-disable-next-line @typescript-eslint/no-namespace
+    namespace Cypress {
+        interface SnapshotOptions extends PercySnapshotOptions {
+            domTransformation?: (documentClone: Document) => void;
+        }
+
+        interface Chainable {
+            percySnapshotElement(name?: string, options?: SnapshotOptions);
+        }
+
+        interface Chainable {
+            /**
+             * Takes a Percy snapshot of a given element
+             */
+            percySnapshotElement(name: string, options: SnapshotOptions): Chainable<void>;
+        }
+    }
+}
+
+Cypress.Commands.add("percySnapshotElement", { prevSubject: true }, (subject, name, options) => {
+    cy.percySnapshot(name, {
+        domTransformation: documentClone => scope(documentClone, subject.selector),
+        ...options,
+    });
+});
+
+function scope(documentClone: Document, selector: string): Document {
+    const element = documentClone.querySelector(selector);
+    documentClone.querySelector('body').innerHTML = element.outerHTML;
+
+    return documentClone;
+}
+
+export { };