Feature: support for mTLS / certificate authentication

[Finkregh]

It would be nice if I could authenticate the client with a certificate for additional peace of mind.

Example solution from another application: https://github.com/immich-app/immich/pull/10860

[rasmuslos]

I added some scaffolding for mTLS in 3.0.0, but AVPlayer, an Apple framework which I use for playback, does not directly support mTLS. I would have to write a custom resource loader, which I want to do, but this is a bigger undertaking.