API has a rate limit of 30 queries per hours, 5 minutes uses 12 queries and leave a reasonable reserve but ensures timestamps of measurements in Home Assistant are about equal to real timestamps
* Updates following comments in PR 44728
* Make all api calls in same thread context
* Set API as parameter to get_all_pools_data
* extract pools data retrieval function to api class
* First implementationof Ondilo component support
* Update manifest toadd pypi pkg dependency
* Update entities name and corrected refresh issue
* Changed percentage unit name
* Corrected merge issues
* Updated coveragerc
* cleaned up code and corrected config flow tests
* Code cleanup and added test for exisitng entry
* Changes following PR comments:
- Inherit CoordinatorEntity instead of Entity
- Merged pools blocking calls into one
- Renamed devices vars to sensors
- Check supported sensor types
- Stop relying on array index position for pools
- Stop relying on attribute position in dict for sensors
* Corrected unit test
* Reformat sensor type check
