Allow Saving Images to Library

Closes: #255
Changelog-Added: Allow Saving Images to Library

damus/Components/ImageCarousel.swift

@@ -49,6 +49,11 @@ struct ImageContextMenuModifier: ViewModifier {
                 } label: {
                     Label("Copy Image", systemImage: "photo.on.rectangle")
                 }
+                Button {
+                    UIImageWriteToSavedPhotosAlbum(someImage, nil, nil, nil)
+                } label: {
+                    Label("Save Image", systemImage: "square.and.arrow.down")
+                }
             }
             Button {
                 showShareSheet = true

damus/Info.plist

@@ -15,6 +15,8 @@
 			</array>
 		</dict>
 	</array>
+	<key>NSPhotoLibraryAddUsageDescription</key>
+	<string>&quot;Granting Damus access to your photo library allows you to save photos.</string>
 	<key>LSApplicationQueriesSchemes</key>
 	<array>
 		<string>river</string>