VLCKit 3.6.0

• update to libvlc 3.0.21
• add new equalizer API and deprecate the previous
• add new statistics API to VLCMedia and deprecate the previous
• fix equalizer state
• fix distribution of VLCDialogProvider.h on macOS solving compilation issue in swift enabled projects
• improve threading on 64bit platforms
• fix audio rendering regression
• fix UPnP busy loop
• backport new event manager from the master branch
• expose API to modify the event configuration at runtime
• fix crashes when using the list player and memory leaks
• remove abort() when leaking event handlers
• fix background thread use on macOS when accessing AppKit
• fix UPnP URL generation leading to issues on iOS/tvOS 17 and macOS 14