text: Title: Examples for documentation
  Body: We need some new examples, they are in the [projects](https://github.com/ploomber/projects) but I'm linking them here for exposure:
  
  1. https://github.com/ploomber/projects/issues/13
  2. https://github.com/ploomber/projects/issues/12
  3. https://github.com/ploomber/projects/issues/11
  4. https://github.com/ploomber/projects/issues/15
  
  For details: https://github.com/ploomber/projects/blob/master/CONTRIBUTING.md
  
  *Note: these issues require some familiarity with Ploomber*