feat(shorebird_cli): when using -v, include all process output

[felangel]

Description

• fix(shorebird_cli): when using -v, include all process output

Previously we would only show the process output if the process exited with a non-zero exit code. This change makes it so when --verbose is enabled, all process logs are always shown.

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