Fix yeelight state when controlled outside of Home Assistant

[bdraco]

Proposed change

• Devices with bg_power would sometimes send back the wrong state
  after turning on/off power. We now always force an update
  when we get bg_power in an update. This replaces the
  check after turn on/turn off as its more robust as we
  only poll AFTER we get the push update to make sure its
  not too soon.

• If the nightlight is enabled, we always use nl_br for the
  brightness prop.

• Report color temp when nightlight mode is enabled as
  max_mireds since nightlight mode locks color temp but
  sends no update since the native yeelight app knows this.

Fixes #56471 Fixes #56749

Type of change

• Dependency upgrade
• Bugfix (non-breaking change which fixes an issue)
• New integration (thank you!)
• New feature (which adds functionality to an existing integration)
• Breaking change (fix/feature causing existing functionality to break)
• Code quality improvements to existing code or addition of tests

Additional information

• This PR fixes or closes issue: fixes #
• This PR is related to issue:
• Link to documentation pull request:

Checklist

• The code change is tested and works locally.
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• Tests have been added to verify that the new code works.

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• Documentation added/updated for www.home-assistant.io

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  Updated and included derived files by running: python3 -m script.hassfest.
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[probot-home-assistant]

Hey there @rytilahti, @zewelor, @shenxn, @starkillerOG, mind taking a look at this pull request as it has been labeled with an integration (yeelight) you are listed as a code owner for? Thanks!
_{^{(message by CodeOwnersMention)}}

[bdraco]

testing those two lines is critical but out of time so will have to come back to this.