feat: add publishing workflow

.github/workflows/publish.yml

@@ -0,0 +1,21 @@
+name: publish
+
+on:
+  workflow_dispatch:
+
+jobs:
+  publish:
+    permissions:
+      id-token: write
+    runs-on: ubuntu-latest
+    # uses: dart-lang/setup-dart/.github/workflows/publish.yml@v1
+    steps:
+      - uses: actions/checkout@v4
+      - uses: dart-lang/setup-dart@b64355ae6ca0b5d484f0106a033dd1388965d06d
+      - uses: subosito/flutter-action@v2
+      - name: Install dependencies
+        run: dart pub get
+      - name: Publish - dry run
+        run: dart pub publish --dry-run
+      # - name: Publish to pub.dev
+      #   run: dart pub publish -f