Add support for specifying supported features to ZhaFan

[freundTech]

Breaking change

Proposed change

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)
• Deprecation (breaking change to happen in the future)
• Breaking change (fix/feature causing existing functionality to break)
• Code quality improvements to existing code or addition of tests

Additional information

After #120190 it was no longer possible for ZHA Fans to specify which features they support. This is needed to fix #97440 (previous PR #114854) and most likely also regressed this feature for King Of Fans Zigbee Fans (though I don't have one to test).

The code is adapted from the ZHA Climate entity and similar code is also already present in the ZHA light and alarm entities.

• This PR is related to issue: IKEA Starkvind fan setting wrong #97440

Checklist

• The code change is tested and works locally.
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• The code has been formatted using Ruff (ruff format homeassistant tests)
• Tests have been added to verify that the new code works.

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[home-assistant]

Hey there @dmulcahey, @Adminiuga, @puddly, @TheJulianJES, mind taking a look at this pull request as it has been labeled with an integration (zha) you are listed as a code owner for? Thanks!

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[freundTech]

Just noticed that this depends on zigpy/zha#87 instead of the other way around. CI should pass once that is merged and the dependency bumped.
Setting to draft for now.

[freundTech]

Resolved by #122813