Add Nightscout integration (#38615)
* Implement NightScout sensor integration
* Add tests for NightScout integration
* Fix Nightscout captalization
* Change quality scale for Nightscout
* Trigger actions
* Add missing tests
* Fix stale comments
* Fix Nightscout manufacturer
* Add entry type service
* Change host to URL on nightscout config flow
* Add ConfigEntryNotReady exception to nighscout init
* Remote platform_schema from nightscout sensor
* Update homeassistant/components/nightscout/config_flow.py
Co-authored-by: Chris Talkington <chris@talkingtontech.com>
Co-authored-by: Chris Talkington <chris@talkingtontech.com>
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