Select preferred discovered HEOS host

[andrewsayre]

Proposed change

Modifies the HEOS discovery flow to select a preferred host (when multiple are available) and show a simple confirmation to the user to add the integration. It does this by connecting to the first discovered host, retrieving the HEOS system information, and using a method from the library to identify the preferred host. Previously, the discovery flow would accumulate all discovered hosts and then present the list to the user. This provides a much better user experience, since we can determine the best host to use automatically. The user can still manually change the host via reconfigure later. This sets the stage for being able to automatically update the host from discovery in the future. Changes are fully tested.

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:
• Link to developer documentation pull request:
• Link to frontend pull request:

Checklist

• 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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[zweckj]

LGTM 👍

[andrewsayre]

Thank you, Josef!