* Add fetching data intro
* Apply suggestions from code review
Co-Authored-By: Martin Hjelmare <marhje52@kth.se>
* Address some comments
* Apply suggestions from code review
Co-Authored-By: Teemu R. <tpr@iki.fi>
* Update API
* Simplify entity with update coordinator.
* Clarify update state methods.
* Update docs/integration_fetching_data.md
Co-Authored-By: Teemu R. <tpr@iki.fi>
Co-authored-by: Martin Hjelmare <marhje52@gmail.com>
Co-authored-by: Teemu R. <tpr@iki.fi>