refactor: remove coverage action in favor of CLI

[marcossevilla]

Status

TESTING

Description

Replacing Very Good Coverage with Very Good CLI

This update removes the separate very_good_coverage GitHub Action and consolidates test execution + coverage enforcement into a single step powered by the Very Good CLI.

What changed

• The "Run Tests" and "Check Code Coverage" steps are now a single step. The CLI handles testing, coverage collection, and coverage enforcement all at once.
• The CLI is installed from Git during the testing phase (temporary — will switch to pub.dev once the required CLI version is published).

How to test

Point your workflow reference to this branch:

Before

uses: VeryGoodOpenSource/very_good_workflows/.github/workflows/dart_package.yml@v1
uses: VeryGoodOpenSource/very_good_workflows/.github/workflows/flutter_package.yml@v1

After (for testing)

uses: VeryGoodOpenSource/very_good_workflows/.github/workflows/dart_package.yml@refactor/remove-vgc
uses: VeryGoodOpenSource/very_good_workflows/.github/workflows/flutter_package.yml@refactor/remove-vgc

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

[marcossevilla]

will update with official very_good_cli version when VeryGoodOpenSource/very_good_cli#1514 lands