feat: allow releasing from Xcode

[bryanoltman]

Description

A common (possibly the most common?) way to release an iOS app is to use the "archive" functionality in Xcode. This will likely involve either editing or replacing the run script build phase inserted by Flutter (which invokes https://github.com/flutter/flutter/blob/master/packages/flutter_tools/bin/xcode_backend.sh, which in turn invokes https://github.com/flutter/flutter/blob/master/packages/flutter_tools/bin/xcode_backend.dart)

Requirements

• [ ] A shorebird release can be generated using the Product > Archive option
• [ ] Developers can still run/debug with non-Shorebird Flutter

[eseidel]

Would solving this solve https://github.com/shorebirdtech/shorebird/issues/1992?

[eseidel]

Our current belief is that while this is important, this is unlikely to be blocking user onboarding at this time. Punting from 1.1

[abdulrehman0796]

Any update on this?

[bryanoltman]

@abdulrehman0796 As Eric mentioned, we don't believe this to be preventing anyone from using Shorebird, so it has not been prioritized.