Shokofin Dev 5.0.4.60

Update your plugin using the dev manifest or by downloading the release from GitHub Releases and installing it manually!

Changes since last build:

fix: Remove defunct IExternalId.UrlFormatString.

fix: Rename TaskTriggerInfo.* → TaskTriggerInfoType.*.

misc: Update to dotnet9 & jellyfin 10.11.

misc: Add dual resolvers for now.

fix: Replace semaphore with actual lock object.

fix: Complete move to dotnet 9.x:

Closes #87