Add "Pause when entering background" option (#198)

Shared/Defaults.swift

@@ -64,6 +64,9 @@ extension Defaults.Keys {
         static let commentsPlacement = Key<CommentsPlacement>("commentsPlacement", default: .separate)
     #endif
     static let pauseOnHidingPlayer = Key<Bool>("pauseOnHidingPlayer", default: defaultForPauseOnHidingPlayer)
+    #if !os(macOS)
+        static let pauseOnEnteringBackground = Key<Bool>("pauseOnEnteringBackground", default: true)
+    #endif
     static let closeLastItemOnPlaybackEnd = Key<Bool>("closeLastItemOnPlaybackEnd", default: false)
 
     static let closePiPOnNavigation = Key<Bool>("closePiPOnNavigation", default: false)

Shared/Settings/PlayerSettings.swift

@@ -20,6 +20,7 @@ struct PlayerSettings: View {
     @Default(.closePiPOnNavigation) private var closePiPOnNavigation
     @Default(.closePiPOnOpeningPlayer) private var closePiPOnOpeningPlayer
     #if !os(macOS)
+        @Default(.pauseOnEnteringBackground) private var pauseOnEnteringBackground
         @Default(.closePiPAndOpenPlayerOnEnteringForeground) private var closePiPAndOpenPlayerOnEnteringForeground
     #endif
 
@@ -59,6 +60,9 @@ struct PlayerSettings: View {
                 sourcePicker
                 qualityPicker
                 pauseOnHidingPlayerToggle
+                #if !os(macOS)
+                    pauseOnEnteringBackgroundToogle
+                #endif
                 closeLastItemOnPlaybackEndToggle
             }
 
@@ -190,6 +194,12 @@ struct PlayerSettings: View {
         Toggle("Pause when player is closed", isOn: $pauseOnHidingPlayer)
     }
 
+    #if !os(macOS)
+        private var pauseOnEnteringBackgroundToogle: some View {
+            Toggle("Pause when entering background", isOn: $pauseOnEnteringBackground)
+        }
+    #endif
+
     private var closeLastItemOnPlaybackEndToggle: some View {
         Toggle("Close video after playing last in the queue", isOn: $closeLastItemOnPlaybackEnd)
     }