Add health workflow

.github/workflows/health.yaml

@@ -0,0 +1,19 @@
+name: Health
+on:
+  pull_request:
+    branches: [ main ]
+    types: [opened, synchronize, reopened, labeled, unlabeled]
+
+jobs:
+  health:
+    uses: dart-lang/ecosystem/.github/workflows/health.yaml@main
+    with:
+      coverage_web: true
+      checkout_submodules: true
+      experiments: native-assets
+      sdk: dev
+      ignore_license: "**.g.dart,pkgs/intl_translation/example/lib/generated/**,pkgs/intl_translation/test/generate_localized/**,pkgs/intl_translation/test/two_components/**"
+      ignore_coverage: "**.g.dart"
+      ignore_packages: "submodules"
+    permissions:
+      pull-requests: write