docs: 完成 APK 构建准备工作并生成详细构建指南

client/ios/FoodWeightApp/Images.xcassets/SplashScreenLogo.imageset/Contents.json

@@ -0,0 +1,23 @@
+{
+  "images": [
+    {
+      "idiom": "universal",
+      "filename": "image.png",
+      "scale": "1x"
+    },
+    {
+      "idiom": "universal",
+      "filename": "image@2x.png",
+      "scale": "2x"
+    },
+    {
+      "idiom": "universal",
+      "filename": "image@3x.png",
+      "scale": "3x"
+    }
+  ],
+  "info": {
+    "version": 1,
+    "author": "expo"
+  }
+}