Add range support to icon translations

[frenck]

Proposed change

Add range support to icon translations, meaning we can now provide icons based on the numeric state through the icons translation files.

Implements the proposal from architectural discussion: home-assistant/architecture#1190

As an example, the battery sensor has been enriched with range definitions, for which I've adjusted and cleaned up the frontend.

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:
• Link to developer documentation pull request: Add range support to icon translations developers.home-assistant#2676
• Link to frontend pull request: Add range support to icon translations frontend#25541

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.

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.

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

[home-assistant]

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[Copilot]

Pull Request Overview

Adds support for numeric range-based icons in the icon translation schema and enriches the battery sensor with range definitions.

• Introduces range_key_validator and ensure_range_is_sorted in script/hassfest/icons.py to validate numeric keys and enforce ascending order.
• Extends the icon_schema_slug to accept an optional top‐level range mapping and applies sorting checks under state_attributes.
• Provides a new battery icon definition with range entries in homeassistant/components/sensor/icons.json.

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
script/hassfest/icons.py	Added numeric‐key and sorted‐range validators; integrated range into the icon schema
homeassistant/components/sensor/icons.json	Added battery sensor with a range of icons based on percentage

Comments suppressed due to low confidence (2)

script/hassfest/icons.py:61

• Add unit tests for ensure_range_is_sorted to cover both valid (sorted) and invalid (unsorted or non‐numeric) range definitions.

def ensure_range_is_sorted(value: dict) -> dict:

homeassistant/components/sensor/icons.json:18

• [nitpick] This adds a range mapping for icons; please update the developer documentation to explain how to define and use range‐based icons in integration translation files.

"battery": {