Report webOS media player state

[rale]

Proposed change

This exposes media player states (playing, paused, idle) on TVs with
recent versions of webOS when running any media player apps.

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 WebOS TV doesn't report media playback status #91709
• This PR is related to issue:
• Link to documentation pull request:

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.
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• 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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  Updated and included derived files by running: python3 -m script.hassfest.
• New or updated dependencies have been added to requirements_all.txt.
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[home-assistant]

Hey there @thecode, mind taking a look at this pull request as it has been labeled with an integration (webostv) you are listed as a code owner for? Thanks!

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[thecode]

Overall looks good, need to handle _attr_assumed_state and add tests coverage:
https://github.com/home-assistant/core/blob/dev/tests/components/webostv/test_media_player.py

[home-assistant]

Please take a look at the requested changes, and use the Ready for review button when you are done, thanks 👍

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[schwickster]

Would love to see this pr in the next major version of HA so I can finally turn on lights when pausing movies and turn off or dim when playing.

[thecode]

I assume you forgot to mark the PR ready, PR looks good, thanks