Remove habitipy references in Habitica integration

[tr4nt0r]

Proposed change

Removes references to habitipy in docstrings and class names.
Previously the integration's naming scheme was using habitipy as prefix for classes and enums. The integration was migrated to a new library recently and habitipy is only used in a deprecated action that will be removed in 2025.6. It was already odd before but now it doesn't make much sense anymore to keep this naming scheme.

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:

Checklist

• The code change is tested and works locally.
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• There is no commented out code in this PR.
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• [ x 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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[frenck]

Thanks, @tr4nt0r 👍

Happy New Year 🥂

../Frenck