Add INVERT to switch_as_x

[disforw]

Breaking change

Proposed change

Add the switch domain to the Switch_as_x integration to facilitate inverting a switch. This will allow the inversion of a switch from the helper UI.

Type of change

• [ ] Dependency upgrade
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• [ ] New integration (thank you!)
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• [ ] 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

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• This PR fixes or closes issue: fixes #
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[home-assistant[bot]]

Hey there @home-assistant/core, mind taking a look at this pull request as it has been labeled with an integration (switch_as_x) you are listed as a code owner for? Thanks!

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[bramstroker]

Unit tests are missing.

Also it makes more sense to me to have this as a separate helper. Might also be very helpful to invert covers for example or other kind of devices. In fact I have this problem with a zwave cover, and I ended up rewiring it to inverse. This helper is switch_as_x and x is in all cases another platform i.e. light, fan etc. So inverse also not really fits this.

Maybe some core member can chime in and agree on this idea of a new helper.