* Add yamllint (in pre-commit and CI)
* Fix linting for all YAML files
* Bump and add it to requirements
* Fix gen_requirements for pre-commit, remove 'v' from version
* Update configuration schema to support multiple Pi-holes
* Construct sensors for each configured Pi-hole
* Ensure each Pi-hole has a unique name
* Update services to handle multiple Pi-holes
* Update tests for multiple configurations
* Refactor tests to support service testing
* Fix else-raise per pyliunt
* Per code review, add all entities in a single call
* Per code review, add the default name as default.
* Per code review, add cv.ensure_list to prevent breaking change
* Per code review, move name validation to schema
* Remove default name
* Per code review, validate api_key in schema definition
* Per code review, rename variables
* Per code review, use list comprehension
* Ensure unique slug names in config validation
* Per code review, refactor to CoroutineMock
* Fix adding sensor entities
* Per code review, refactor mock function creation
* Per code review, refactor mock function return values
Xiaonan Shen
Franck Nijhof
John Luetke