refactor: url params in jotai

[joneugster]

• complete handling of url params in jotai:
  • editor content
  • loaded code from URL
  • selecting projects
  • -> this makes the code much simpler and avoids complicated useEffect statements
• includes feat: automatic linting #85:
  • add eslint config
  • update CI to include lint step
  • prettier setting to remove ;
  • npm run format and npm run lint
  • refactor: move content of Navigation.tsx
• Fix: wait in cypress test for light bulb to appear before trying quickfixes

Fixes: #82