feat: Add basic cypress testing

Part-of: <https://dev.funkwhale.audio/funkwhale/funkwhale/-/merge_requests/1795>

front/cypress.config.ts

@@ -0,0 +1,13 @@
+import { defineConfig } from 'cypress'
+
+export default defineConfig({
+  chromeWebSecurity: false,
+  e2e: {
+    // We've imported your old cypress plugins here.
+    // You may want to clean this up later by importing these.
+    setupNodeEvents(on, config) {
+      return require('./cypress/plugins/index.js')(on, config)
+    },
+    baseUrl: 'https://demo.funkwhale.audio',
+  },
+})