feat: Add API indicateurs_services

- rename prelevements APIs functions
- add parameter checks for each operation
- add `get_indicateurs_services_communes` and `get_indicateurs_services_indicateurs`
- add package documentation main page and improve documentation

Refs #4
2 jobs for master in 1 minute and 49 seconds (queued for 11 seconds)
Status Name Job ID Coverage
  Check
passed check #192358
docker

00:00:57

 
  Website
passed website #192359
docker

00:00:51