feat!: detect licenses locally

[alestiago]

Status

READY

Description

Instead of fetching, detect license locally. This change uses pana's non-public API intentionally, refer to dart-lang/pana#1277

Now there is no need of a network connection, instead there is a need for a package_config.json (generated on pub get) to know the paths of the cached packages.

There is no public facing API change, instead is an internal implementation change. Hence, there is a small chance that previous detections might differ from current detections.

Demonstration

After the change:

CleanShot.2023-11-17.at.11.13.39.mp4

Before the change:

CleanShot.2023-11-17.at.11.14.10.mp4

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