Use the ABLLinkAudioSink in LinkHut

Add a ping-pong sink & source pair

Update Link to version 4.0.0b4

Don't zip the uploaded artifacts on CI twice

Fix a documentation warning

Build with macOS 26 & Xcode 26

Update the Xcode version on AppVeyor to 14.2.0

Update Readme

Add a plist key to suppress the default Link notifications

Remove fat library from the release

Set the deployment target for LinkKit to 9.0

This was accidentally set to 15.0 which breaks compatibility with older iOS
versions