Add "invert: false" option to cover position feature

[McGiverGim]

Proposed change

The feature for cover position has the slider "inverted". I understand the reason of this decision, but this is driving me crazy since the beginning and I'm not the only one: https://community.home-assistant.io/t/reverse-slider-display/746748 so I decided to add an "optional" parameter to disable the inversion.

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

Simply a new optional invert option is available. If false, then the inversion disappears.

features:
  - type: "cover-position"
    invert: false

Additional information

• This PR fixes or closes issue: fixes #
• This PR is related to issue or discussion: https://community.home-assistant.io/t/reverse-slider-display/746748
• Link to documentation pull request: Add invert cover feature home-assistant.io#42348

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

[Misiu]

Take a look at my PR: #17687 and the reasoning behind closing it, but I fully agree that this should be at least an option.
Maybe this time we will get a green light.

[wendevlin]

Hey good idea, but we decided to not do this officially because it is a very complex topic also in the backend.
The issue is that a cover can have too much purposes, we hope we can fix that in the future by splitting it up.

I do understand your pain points about this and you can add for you and the community a custom feature for this behavior (see documentation).

I am sorry.

All the best
Wendelin

[McGiverGim]

I ended creating the custom feature, I added the code in the forum, if someone wants it https://community.home-assistant.io/t/reverse-slider-display/746748/13