Allow to reorder areas and floors

[piitaya]

Proposed change

Allow to reorder areas and floors. It will be used in home dashboard and in every floor/area picker.

CleanShot.2025-11-18.at.18.13.50.2.mp4

Needs core change : home-assistant/core#156802

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:
• Link to documentation pull request:

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

[ildar170975]

Shouldn't we add some kind of a "tip" on a page to tell users that they can drag-n-drop?
Kind of this:

[ildar170975]

Another question - shouldn't this reordering of floors change a level value of every floor?
Asked here: #28220