Add support for Apps and Radios to Squeezebox Media Browser

[peteS-UK]

Breaking change

Proposed change

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• This PR fixes or closes issue: fixes #
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[home-assistant]

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

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[peteS-UK]

replacing PR 129288 which I completed broke when trying to merge something else.