PLAYNEXT-1325 Add new swimlane for audio livesteams

[mutaben]

Description

For the implementation of PAC audio, this PR implements the new audio livestreams swimlane in the new page.
It shows a horizontal swimlane with square images for each radio channel logo.

Changes Made

• Add a new case liveAudioSquaredSwimlane in the SectionLayout enum
• Return this case from the PageViewModel.layout when the mediaType is AUDIO for the contentSection
• Call the already defined radioLivestreams(for: contentSection.vendor, contentProviders: .all) endpoint for the publisher
• Add a new layout with a new cell (LiveRadioSquaredCell and LiveRadioSquaredCellSize)
• Detect the new case and propagate the right calls (Content.title, Content. publisher(...), PageViewController.layoutSection(...), PageViewController.MediaCell.body)

Checklist

• I have followed the project's style guidelines.
• I have performed a self-review of my own changes.
• I have made corresponding changes to the documentation.
• My changes do not generate new warnings.
• I have tested my changes and I am confident that it works as expected and doesn't introduce any known regressions.
• I have reviewed the contribution guidelines.