Separate fan speeds into percentages and presets modes

[bdraco]

Breaking change

Fans now use a percentage slider for speeds and a dropdown for preset modes.

Proposed change

Core: home-assistant/core#45407

Type of change

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

Example configuration

Additional information

• This PR fixes or closes issue: fixes #
• This PR is related to issue or discussion: Add an additional fan speed architecture#127
• Link to documentation pull request: Update fan documentation for entity model separation of fan speeds into percentages and presets modes home-assistant.io#16265

Checklist

• The code change is tested and works locally.
• There is no commented out code in this PR.
• Tests have been added to verify that the new code works.

If user exposed functionality or configuration variables are added/changed:

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

[Jc2k]

Having seen the UI - wondering if we need to support some kind of "step size"? Otherwise this could be an annoying UI for fans that genuinely only do have 3 speeds. For dyson we could set this to 10, and for homekit_controller we could read it off the characteristic metadata too. Is that something thats possible?

[bdraco]

Having seen the UI - wondering if we need to support some kind of "step size"? Otherwise this could be an annoying UI for fans that genuinely only do have 3 speeds. For dyson we could set this to 10, and for homekit_controller we could read it off the characteristic metadata too. Is that something thats possible?

I think it's doable but I'm not sure what to do with the ones with 7 speeds and a step size of 14.28. Also for zwave and isy we wouldn't know the step size in advance. Maybe something we can add later if we find we really need it since it won't require any refactoring in the entity model, just a new property? (I'm starting to get a bit nervous about scope and the size of the core PR)

Edit: I did some testing and step size should be relatively clear to do this later, and it should make the homekit experience a bit cleaner. For backwards compat we would default to a step size of 1

[bdraco]

Marking as draft until the preset_mode concern is addressed

[bdraco]

Retested. All seems ok 👍