fix: iOS tab icon issue

Pixiview.iOS/Assets.xcassets/IconSortRegular.imageset/Contents.json

@@ -0,0 +1,23 @@
+{
+  "images": [
+    {
+      "filename": "sort-size-up-alt-regular.png",
+      "scale": "1x",
+      "idiom": "universal"
+    },
+    {
+      "filename": "sort-size-up-alt-regular@2x.png",
+      "scale": "2x",
+      "idiom": "universal"
+    },
+    {
+      "filename": "sort-size-up-alt-regular@3x.png",
+      "scale": "3x",
+      "idiom": "universal"
+    }
+  ],
+  "info": {
+    "version": 1,
+    "author": "xcode"
+  }
+}