Add nmi (nautical miles) as valid distance unit

[mib1185]

Proposed change

We already have knots (kn) as valid speed unit, which is just nmi per hour, we should also support nmi (nautical miles) as valid distance unit.

reference: https://community.home-assistant.io/t/add-nautical-miles-as-a-valid-unit-for-distance-device-class/754284

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 HA thinks that nautical miles are wrong unit for class distance #124592
• This PR is related to issue:
• Link to documentation pull request:
  • Add nmi (nautical miles) as valid distance unit home-assistant.io#34462
  • Add nmi (nautical miles) as valid distance unit developers.home-assistant#2293

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 Ruff (ruff format homeassistant tests)
• Tests have been added to verify that the new code works.

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

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• 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.

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[joostlek]

This PR is changing our entity model. Before we can review this PR there needs to be approval in a discussion in our architecture repository.

https://github.com/home-assistant/architecture/discussions

https://developers.home-assistant.io/docs/core/entity#changing-the-entity-model

[mib1185]

yeah you're right - will open a proper discussion 👍

[mib1185]

discussion started: home-assistant/architecture#1129

[mib1185]

this has been approved home-assistant/architecture#1129 (comment), so un-draft it 🎉

[frenck]

Thanks, @mib1185 👍

../Frenck