feat: create dart_package and flutter_package workflows

Author: felangel

.github/workflows/dart_package.yml

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+name: Dart Package Workflow
+
+on:
+  workflow_call:
+    inputs:
+      working_directory:
+        required: false
+        type: string
+        default: "."
+      coverage_excludes:
+        required: false
+        type: string
+        default: ""
+
+jobs:
+  build:
+    defaults:
+      run:
+        working-directory: ${{inputs.working_directory}}
+
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - uses: dart-lang/setup-dart@v1
+
+      - name: Install Dependencies
+        run: dart pub get
+
+      - name: Format
+        run: dart format --set-exit-if-changed .
+
+      - name: Analyze
+        run: dart analyze --fatal-infos --fatal-warnings lib
+
+      - name: Run Tests
+        run: |
+          pub global activate test_coverage
+          export PATH=$PATH:$HOME/.pub-cache/bin
+          test_coverage
+
+      - name: Check Code Coverage
+        uses: VeryGoodOpenSource/very_good_coverage@v1.2.0
+        with:
+          path: ${{inputs.working_directory}}/coverage/lcov.info
+          exclude: ${{inputs.coverage_excludes}}

.github/workflows/flutter_package.yaml

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+name: Flutter Package Workflow
+
+on:
+  workflow_call:
+    inputs:
+      working_directory:
+        required: false
+        type: string
+        default: "."
+      coverage_excludes:
+        required: false
+        type: string
+        default: ""
+
+jobs:
+  build:
+    defaults:
+      run:
+        working-directory: ${{inputs.working_directory}}
+
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - uses: subosito/flutter-action@v2
+        with:
+          flutter-version: 2.8.1
+          channel: stable
+          cache: true
+
+      - name: Install Dependencies
+        run: |
+          flutter pub global activate very_good_cli
+          very_good --analytics false
+          very_good packages get --recursive
+      
+      - name: Format
+        run: flutter format --set-exit-if-changed lib test
+
+      - name: Analyze
+        run: flutter analyze lib test
+
+      - name: Run tests
+        run: flutter test --no-pub --coverage --test-randomize-ordering-seed random
+
+      - name: Check Code Coverage
+        uses: VeryGoodOpenSource/very_good_coverage@v1.2.0
+        with:
+          path: ${{inputs.working_directory}}/coverage/lcov.info
+          exclude: ${{inputs.coverage_excludes}}

README.md

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+# Very Good Workflows
+
+[![Very Good Ventures][logo_white]][very_good_ventures_link_dark]
+[![Very Good Ventures][logo_black]][very_good_ventures_link_light]
+
+Developed with 💙 by [Very Good Ventures][very_good_ventures_link] 🦄
+
+---
+
+Reusable [GitHub Workflows][github_workflows_link] used at [Very Good Ventures][very_good_ventures_link] 🦄
+
+## Usage
+
+```yaml
+# A reusable workflow for Dart packages
+uses: VeryGoodOpenSource/very_good_workflows/.github/workflows/dart_package.yml@main
+
+# A reusable workflow for Flutter packages
+uses: VeryGoodOpenSource/very_good_workflows/.github/workflows/flutter_package.yml@main
+```
+
+[github_workflows_link]: https://docs.github.com/en/actions/learn-github-actions/workflow-syntax-for-github-actions
+[logo_black]: https://raw.githubusercontent.com/VGVentures/very_good_brand/main/styles/README/vgv_logo_black.png#gh-light-mode-only
+[logo_white]: https://raw.githubusercontent.com/VGVentures/very_good_brand/main/styles/README/vgv_logo_white.png#gh-dark-mode-only
+[very_good_ventures_link_dark]: https://verygood.ventures#gh-dark-mode-only
+[very_good_ventures_link_light]: https://verygood.ventures#gh-light-mode-only
+[very_good_ventures_link]: https://verygood.ventures