Implement base entity class for Twinkly

[sVnsation]

Proposed change

Like suggested from @abmantis here #134041 (comment)
The implementation creates a new base entity class to eliminate code duplication for future additions. This base class will handle the common DeviceInfo instantiation and provide shared functionality. Useful for implementing additional Entity Types.

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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• 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:

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[home-assistant]

Hey there @dr1rrb, @RobBie1221, @Olen, mind taking a look at this pull request as it has been labeled with an integration (twinkly) you are listed as a code owner for? Thanks!

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