Add initial iOS project files for iso-test-app

- Created Info.plist with essential app configuration including bundle identifiers, versioning, and URL schemes.
- Added PrivacyInfo.xcprivacy to specify accessed API types and privacy tracking settings.
- Implemented SplashScreen.storyboard for the app's launch screen with a logo and background color.
- Established Expo.plist for update configurations, setting updates to check on launch.
- Created a bridging header for Swift compatibility.
- Added an empty entitlements file for future use.

ios/isotestapp/Images.xcassets/SplashScreenBackground.colorset/Contents.json

@@ -0,0 +1,20 @@
+{
+  "colors": [
+    {
+      "color": {
+        "components": {
+          "alpha": "1.000",
+          "blue": "1.00000000000000",
+          "green": "1.00000000000000",
+          "red": "1.00000000000000"
+        },
+        "color-space": "srgb"
+      },
+      "idiom": "universal"
+    }
+  ],
+  "info": {
+    "version": 1,
+    "author": "expo"
+  }
+}