Pooldose action exceptions

[lmaertin]

Breaking change

Proposed change

Add action exception handling; centralized in entity.py for all write entities.
If approved integration gets 'silver' quality.

I decided to go for this approach to avoid a lot of redundant code in each (write) platform for handling ServiceValidationErrors. If not following the logic of seperated platforms, I can move the functionality to the platforms as well. Need advice from reviewer.

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: Pooldose bump to silver (action exceptions) home-assistant.io#42713
• Link to developer documentation pull request:
• Link to frontend pull request:

Checklist

• I understand the code I am submitting and can explain how it works.
• The code change is tested and works locally.
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• Tests have been added to verify that the new code works.
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