Added launchscreen

ios/Runner/Assets.xcassets/LauncherBackgroundColor.colorset/Contents.json

@@ -5,9 +5,9 @@
         "color-space" : "srgb",
         "components" : {
           "alpha" : "1.000",
-          "blue" : "0.043",
-          "green" : "0.043",
-          "red" : "0.043"
+          "blue" : "0.122",
+          "green" : "0.408",
+          "red" : "0.937"
         }
       },
       "idiom" : "universal"

ios/Runner/Assets.xcassets/LauncherIconOnly.imageset/Contents.json

@@ -0,0 +1,12 @@
+{
+  "images" : [
+    {
+      "filename" : "Icon-Transparent.png",
+      "idiom" : "universal"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}