feat: add macOS platform support

[mxknt]

Description

This PR adds macOS as a supported platform, including the required XCode build configurations and run schemes to support the usual three Flutter flavors: production, staging and development. See VeryGoodOpenSource/very_good_cli#452

The process of adding macOS support took the following steps (roughly mapped to the included commits):

• add the basic macOS project scaffold using flutter create --platforms=macos ., removing the new main.dart and other unneeded files that the command added.
• add the required xcode build configurations for each flavor, Debug-development, Release-staging etc.
• update the bundle id for the development and staging build configurations, adding a .dev and .stg suffix respectively.
• add icon assets for each flavor
• add xcode run schemes for each flavor

Type of Change

• ✨ New feature (non-breaking change which adds functionality)
• 🛠️ Bug fix (non-breaking change which fixes an issue)
• ❌ Breaking change (fix or feature that would cause existing functionality to change)
• 🧹 Code refactor
• ✅ Build configuration change
• 📝 Documentation
• 🗑️ Chore

[mxknt]

Let me now if I should run the generator and commit the changes to the brick here, or if that should happen separately.

[renancaraujo]

Let me now if I should run the generator and commit the changes to the brick here, or if that should happen separately.

It is okay, it will run automatically after merge

[renancaraujo]

Thanks for your contribution!

[parsa10]

Has this been activated? I'm not receiving the macOS configuration even after executing the 'very_good create' command.

Thanks for your contribution!

[alestiago]

@parsa10 this has not been published yet. We'll most likely publish next week, after that you'll see the changes.

If you want to get notified upon release you can use GitHub to Watch for releases 🙌

[alestiago]

#314 is tracking the release of this feature.