macOS: add icon

Platform/Assets.xcassets/AccentColor.colorset/Contents.json

@@ -1,6 +1,15 @@
 {
   "colors" : [
     {
+      "color" : {
+        "color-space" : "srgb",
+        "components" : {
+          "alpha" : "1.000",
+          "blue" : "0.922",
+          "green" : "0.510",
+          "red" : "0.247"
+        }
+      },
       "idiom" : "universal"
     }
   ],

Platform/Assets.xcassets/AppIcon-macOS.appiconset/Contents.json

@@ -1,51 +1,61 @@
 {
   "images" : [
     {
+      "filename" : "icon_16pt.png",
       "idiom" : "mac",
       "scale" : "1x",
       "size" : "16x16"
     },
     {
+      "filename" : "[email protected]",
       "idiom" : "mac",
       "scale" : "2x",
       "size" : "16x16"
     },
     {
+      "filename" : "icon_32pt.png",
       "idiom" : "mac",
       "scale" : "1x",
       "size" : "32x32"
     },
     {
+      "filename" : "[email protected]",
       "idiom" : "mac",
       "scale" : "2x",
       "size" : "32x32"
     },
     {
+      "filename" : "icon_128pt.png",
       "idiom" : "mac",
       "scale" : "1x",
       "size" : "128x128"
     },
     {
+      "filename" : "[email protected]",
       "idiom" : "mac",
       "scale" : "2x",
       "size" : "128x128"
     },
     {
+      "filename" : "icon_256pt.png",
       "idiom" : "mac",
       "scale" : "1x",
       "size" : "256x256"
     },
     {
+      "filename" : "[email protected]",
       "idiom" : "mac",
       "scale" : "2x",
       "size" : "256x256"
     },
     {
+      "filename" : "icon_512pt.png",
       "idiom" : "mac",
       "scale" : "1x",
       "size" : "512x512"
     },
     {
+      "filename" : "[email protected]",
       "idiom" : "mac",
       "scale" : "2x",
       "size" : "512x512"