Add entity pictures to Habitica integration

[tr4nt0r]

Proposed change

Adds entity pictures for HP, MP, XP, GP, and Class.

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 #
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• Link to documentation pull request:

Checklist

• The code change is tested and works locally.
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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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[zweckj]

tbh I'm not sure if we really should have those in HA; but rather import from the lib

[home-assistant]

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[tr4nt0r]

@zweckj the current lib is outdated and unmaintained, so not possible. The new one is not merged yet.

[zweckj]

Now it is and we got conflicts 😉

[tr4nt0r]

@zweckj well, that was... predictable 😂