This performs the recommended setting updates from xcode, though I needed to turn off `ENABLE_USER_SCRIPT_SANDBOXING` as it does not seem to be fully compatible with flutter.
I also dealt with a warning of: "Extension declares a conformance of imported type 'String' to imported protocol 'Error'; this will not behave correctly if the owners of 'Swift' introduce this conformance in the future", by creating and using some custom error types.
Lastly, I fixed our podfile to ensure that the `IPHONEOS_DEPLOYMENT_TARGET` is at least 12, which is our project setting.
This updates flutter to 3.24.1, the latest stable version, and also updates our flutter dependencies to latest.
It targets the latest android sdk, 34, which is required if we want to publish a new version to the Google Play store.
I also needed to make a few adjustments to handle deprecations. The biggest change is that I needed to wrap the main widget in MaterialApp to avoid problems with AdaptiveSwitch in iOS.
