feature: Add swift support to arri use

[joshmossas]

Describe the feature

arri use <version> should search for Package.swift files and update the Arri Client Swift version to version specified by the user. Ideally this would also work on XCode projects as well.

Additional context

Currently this feature works with:

• Cargo.toml (rust)
• package.json (js/ts)
• pubspec.yaml (dart)

So adding swift support brings it inline with the expected user behavior

Would you be willing to implement this feature?

Yes