👷(CI) add test-e2e job to people.yml

Add test-e2e to people.yml, it will run e2e tests on every PR.
Steps:
  - set env vars for e2e tests
  - build and start docker servers
  (backend, keycloak, DB)
  - install playwright
  - build apps
  - run e2e tests
  - save reports

src/frontend/apps/desk/package.json

@@ -5,6 +5,7 @@
   "scripts": {
     "dev": "next dev",
     "build": "prettier --check . && yarn stylelint && next build",
+    "build:ci": "cp .env.development .env.local && yarn build",
     "build-theme": "cunningham -g css,ts -o src/cunningham --utility-classes",
     "start": "next start",
     "lint": "next lint",