Add publish GitHub Action

.github/workflows/publish.yml

@@ -0,0 +1,32 @@
+name: Publish to pub.dev
+
+on:
+  push:
+    tags:
+      - "v[0-9]+.[0-9]+.[0-9]+*" # tag-pattern on pub.dev: 'v'
+
+jobs:
+  publish:
+    name: Publish to pub.dev
+    runs-on: ubuntu-latest
+
+    permissions:
+      id-token: write
+
+    steps:
+      - name: Clone repository
+        uses: actions/checkout@v3
+
+      - name: Install Dart
+        uses: dart-lang/setup-dart@v1
+        with:
+          sdk: stable
+
+      - name: Install Flutter
+        uses: subosito/flutter-action@v2
+        with:
+          channel: stable
+          flutter-version: 3.16.3
+
+      - name: Publish to pub.dev
+        run: flutter pub publish --force