fix: Move content into to frontend directory

Doing this BEFORE the merge prevents a lot of merge conflicts.

Signed-off-by: Tilman Vatteroth <git@tilmanvatteroth.de>

frontend/cypress/e2e/language.spec.ts

@@ -0,0 +1,29 @@
+/*
+ * SPDX-FileCopyrightText: 2022 The HedgeDoc developers (see AUTHORS file)
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import { languages } from '../fixtures/languages'
+
+describe('Languages', () => {
+  beforeEach(() => {
+    cy.visitHome()
+    cy.getByCypressId('settingsButton').click()
+  })
+
+  it('all languages are available', () => {
+    cy.getByCypressId('language-picker').find('option').as('languages')
+    cy.get('@languages').should('have.length', 28)
+    languages.forEach((language) => {
+      cy.get('@languages').contains(language)
+    })
+  })
+
+  it('language changes affect the UI', () => {
+    cy.getByCypressId('language-picker').select('English')
+    cy.getByCypressId('new-note-button').find('span').contains('New note')
+    cy.getByCypressId('language-picker').select('Deutsch')
+    cy.getByCypressId('new-note-button').find('span').contains('Neue Notiz')
+  })
+})