build(ui): migrate from CRA/Jest to Vite/Vitest (#3311)

* feat: create vite project

* feat: it's alive!

* feat: `make dev` working!

* feat: replace custom serviceWorker with vite plugin

* test: replace Jest with Vitest

* fix: run prettier

* fix: skip eslint for now.

* chore: remove ui.old folder

* refactor: replace lodash.pick with simple destructuring

* fix: eslint errors (wip)

* fix: eslint errors (wip)

* fix: display-name eslint errors (wip)

* fix: no-console eslint errors (wip)

* fix: react-refresh/only-export-components eslint errors (wip)

* fix: react-refresh/only-export-components eslint errors (wip)

* fix: react-refresh/only-export-components eslint errors (wip)

* fix: react-refresh/only-export-components eslint errors (wip)

* fix: build

* fix: pwa manifest

* refactor: pwa manifest

* refactor: simplify PORT configuration

* refactor: rename simple JS files

* test: cover playlistUtils

* fix: react-image-lightbox

* feat(ui): add sourcemaps to help debug issues

ui/src/i18n/provider.js

@@ -27,7 +27,10 @@ export function retrieveTranslation(locale) {
 
 const removeEmpty = (obj) => {
   for (let k in obj) {
-    if (obj.hasOwnProperty(k) && typeof obj[k] === 'object') {
+    if (
+      Object.prototype.hasOwnProperty.call(obj, k) &&
+      typeof obj[k] === 'object'
+    ) {
       removeEmpty(obj[k])
     } else {
       if (!obj[k]) {