Add support for visionOS

- Introduced a versioned Package.swift as per [specification](https://github.com/apple/swift-package-manager/blob/main/Documentation/Usage.md\#version-specific-manifest-selection)
- Added `.visionOS` as a supported platform
- Updated handling of the background mode of AVPlayer for visionOS
- Disabled `ImageDecoders.Video` as `AVAssetImageGenerator.copyCGImage` is not available for visionOS

Package.swift

@@ -1,4 +1,4 @@
-// swift-tools-version:5.7
+// swift-tools-version:5.9
 import PackageDescription
 
 let package = Package(
@@ -7,7 +7,8 @@ let package = Package(
         .iOS(.v13),
         .tvOS(.v13),
         .macOS(.v10_15),
-        .watchOS(.v6)
+        .watchOS(.v6),
+        .visionOS(.v1),
     ],
     products: [
         .library(name: "Nuke", targets: ["Nuke"]),

Package@swift-5.7.swift

@@ -0,0 +1,24 @@
+// swift-tools-version:5.7
+import PackageDescription
+
+let package = Package(
+    name: "Nuke",
+    platforms: [
+        .iOS(.v13),
+        .tvOS(.v13),
+        .macOS(.v10_15),
+        .watchOS(.v6)
+    ],
+    products: [
+        .library(name: "Nuke", targets: ["Nuke"]),
+        .library(name: "NukeUI", targets: ["NukeUI"]),
+        .library(name: "NukeVideo", targets: ["NukeVideo"]),
+        .library(name: "NukeExtensions", targets: ["NukeExtensions"])
+    ],
+    targets: [
+        .target(name: "Nuke"),
+        .target(name: "NukeUI", dependencies: ["Nuke"]),
+        .target(name: "NukeVideo", dependencies: ["Nuke"]),
+        .target(name: "NukeExtensions", dependencies: ["Nuke"])
+    ]
+)

Sources/NukeVideo/ImageDecoders+Video.swift

@@ -2,7 +2,7 @@
 //
 // Copyright (c) 2015-2023 Alexander Grebenyuk (github.com/kean).
 
-#if !os(watchOS)
+#if !os(watchOS) && !os(visionOS)
 
 import Foundation
 import AVKit

Sources/NukeVideo/VideoPlayerView.swift

@@ -137,7 +137,11 @@ public final class VideoPlayerView: _PlatformBaseView {
         let playerItem = AVPlayerItem(asset: asset)
         let player = AVQueuePlayer(playerItem: playerItem)
         player.isMuted = true
-        player.preventsDisplaySleepDuringVideoPlayback = false
+#if os(visionOS)
+            player.preventsAutomaticBackgroundingDuringVideoPlayback = false
+#else
+            player.preventsDisplaySleepDuringVideoPlayback = false
+#endif
         player.actionAtItemEnd = isLooping ? .none : .pause
         self.player = player