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/.gitignore

@@ -1,23 +1,6 @@
-# See https://help.github.com/articles/ignoring-files/ for more about ignoring files.
-
-# dependencies
-/node_modules
-/.pnp
-.pnp.js
-
-# testing
-/coverage
-
-# misc
-.DS_Store
-.env.local
-.env.development.local
-.env.test.local
-.env.production.local
-
-npm-debug.log*
-yarn-debug.log*
-yarn-error.log*
+node_modules
+.eslintcache
 
 build/*
 !build/.gitkeep
+/coverage/