Add a native SwiftUI macOS app that shares the iOS player.

The GTK Mac build stays; CI now also publishes maturita-macos-swift.

Co-authored-by: Cursor <cursoragent@cursor.com>

macos/Maturita/Assets.xcassets/AppIcon.appiconset/Contents.json

@@ -0,0 +1,18 @@
+{
+  "images" : [
+    { "filename" : "icon_16x16.png", "idiom" : "mac", "scale" : "1x", "size" : "16x16" },
+    { "filename" : "icon_16x16@2x.png", "idiom" : "mac", "scale" : "2x", "size" : "16x16" },
+    { "filename" : "icon_32x32.png", "idiom" : "mac", "scale" : "1x", "size" : "32x32" },
+    { "filename" : "icon_32x32@2x.png", "idiom" : "mac", "scale" : "2x", "size" : "32x32" },
+    { "filename" : "icon_128x128.png", "idiom" : "mac", "scale" : "1x", "size" : "128x128" },
+    { "filename" : "icon_128x128@2x.png", "idiom" : "mac", "scale" : "2x", "size" : "128x128" },
+    { "filename" : "icon_256x256.png", "idiom" : "mac", "scale" : "1x", "size" : "256x256" },
+    { "filename" : "icon_256x256@2x.png", "idiom" : "mac", "scale" : "2x", "size" : "256x256" },
+    { "filename" : "icon_512x512.png", "idiom" : "mac", "scale" : "1x", "size" : "512x512" },
+    { "filename" : "icon_512x512@2x.png", "idiom" : "mac", "scale" : "2x", "size" : "512x512" }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}