Add toggle switch to Daikin HVAC units

[disforw]

Breaking change

Proposed change

This PR adds a switch entity to each device allowing it to be easily switched on and off. This is especially helpful when using Mini-split units.

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

• This PR fixes or closes issue: fixes #
• This PR is related to issue:
• Link to documentation pull request: Add toggle switch to Daikin home-assistant.io#28097

Checklist

• The code change is tested and works locally.
• Local tests pass. Your PR cannot be merged unless tests pass
• There is no commented out code in this PR.
• I have followed the development checklist
• I have followed the perfect PR recommendations
• The code has been formatted using Black (black --fast homeassistant tests)
• 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

If the code communicates with devices, web services, or third-party tools:

• The manifest file has all fields filled out correctly.
  Updated and included derived files by running: python3 -m script.hassfest.
• New or updated dependencies have been added to requirements_all.txt.
  Updated by running python3 -m script.gen_requirements_all.
• For the updated dependencies - a link to the changelog, or at minimum a diff between library versions is added to the PR description.
• Untested files have been added to .coveragerc.

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• I have reviewed two other open pull requests in this repository.

[home-assistant]

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

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[disforw]

Adding a simple on/off switch to sit besides the climate. I can disable it by default if you want.

[github-actions]

There hasn't been any activity on this pull request recently. This pull request has been automatically marked as stale because of that and will be closed if no further activity occurs within 7 days.
Thank you for your contributions.

[frenck]

Hi there @disforw 👋

I've rebased your PR, there is a CI error. Could you take a look?

../Frenck

[home-assistant]

Please take a look at the requested changes, and use the Ready for review button when you are done, thanks 👍

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[disforw]

@frenck noted. Thank you.

[frenck]

Thanks, @disforw 👍

../Frenck