Enhance download notifications and settings; add support for live activities

- Updated notification body to use proper German quotation marks for download failure alerts.
- Refactored audio interruption handling in PlayerEngine to utilize MainActor.assumeIsolated for better performance.
- Introduced nonisolated properties for support and downloads directories in ProgressSyncManager.
- Improved FullHistoryView and MainView with additional toolbar items and alerts for download failures.
- Added new toggles in SettingsView for parallel downloads and mobile data usage.
- Created new color assets for the DownloadWidgetExtension and updated widget appearance.
- Implemented Info.plist for DownloadWidgetExtension to support widget functionality.
- Enabled live activities support in iOS Info.plist.

ABS Client/Audiobookshelf swift/Views/FullHistoryView.swift

@@ -63,6 +63,13 @@ struct FullHistoryView: View {
                     Button(String(localized: "settings.done")) { dismiss() }
                 }
             }
+            #else
+            .toolbar {
+                ToolbarItem(placement: .confirmationAction) {
+                    Button(String(localized: "settings.done")) { dismiss() }
+                        .keyboardShortcut(.cancelAction)
+                }
+            }
             #endif
             .overlay {
                 if app.history.entries.isEmpty {
@@ -77,6 +84,8 @@ struct FullHistoryView: View {
         #if os(iOS)
         .presentationDetents([.medium, .large])
         .presentationDragIndicator(.visible)
+        #else
+        .frame(minWidth: 480, minHeight: 560)
         #endif
     }