Add debugging-oriented player view layout

[defagos]

As a Pillarbox developer I would like to be able to quickly have a look at what is being played.

Acceptance criteria

• A demo player layout is available displaying various debugging information (e.g. current tracks, bitrates, etc.).

Hints

• On Apple TV debugging options can be enabled from the Developer settings. They could inspire us. Maybe there is also something similar available for iOS nowadays, making this task irrelevant.
• 17.4 adds AVVideoPerformanceMetrics which might be useful.

Tasks

• [ ] Add debbugging-oriented demo player layout.
• [ ] Add to selectable demo layouts.
• [ ] Add button to download and display the playlist within the app directly.
• [ ] Content of the error log (might display non-critical bandwidth-related stream issues in real time, e.g.).

[github-actions[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs during the next 14 days or if the stale label is not removed.

[github-actions[bot]]

This issue has been automatically closed because it has not had recent activity.

[github-actions[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs during the next 14 days or if the stale label is not removed.

[defagos]

Now irrelevant since most of the suggested debugging tools have been implemented recently:

• Playback HUD overlay on iOS (demo only since we are tweaking a setting).
• Metrics collector.
• Metrics debugging view (demo only at the moment but could be moved to the Monitoring package).

Only the playlist download feature is missing but I honestly don't think it would be useful (proxy tools are better and provide for a more comfortable experience).