add automated publishing

.github/actions/publish_flutter_package.yaml

+name: Publish Flutter package to pub.dev
+description: Publish your Flutter package to pub.dev
+
+inputs:
+  working-directory:
+    description: directory with-in the repository where the package is located (if not in the repository root)
+    required: false
+
+runs:
+  using: "composite"
+  steps:
+    - name: 📚 Git Checkout
+      uses: actions/checkout@v4
+    - name: 🐦 Setup Flutter
+      uses: subosito/flutter-action@v2
+
+    - name: 🪪 Get Id Token
+      uses: actions/github-script@v6
+      with:
+        script: |
+          let pub_token = await core.getIDToken('https://pub.dev')
+          core.exportVariable('PUB_TOKEN', pub_token)
+
+    - name: 📢 Authenticate
+      shell: ${{ inputs.shell }}
+      run: flutter pub pub token add https://pub.dev --env-var PUB_TOKEN
+
+    - name: 📦 Install dependencies
+      shell: ${{ inputs.shell }}
+      run: flutter pub get
+      working-directory: ${{ inputs.working-directory }}
+
+    - name: 🌵 Dry Run
+      shell: ${{ inputs.shell }}
+      run: flutter pub publish --dry-run
+      working-directory: ${{ inputs.working-directory }}
+
+    - name: 📢 Publish
+      shell: ${{ inputs.shell }}
+      run: flutter pub publish -f
+      working-directory: ${{ inputs.working-directory }}
\ No newline at end of file

.github/workflows/publish.yml

@@ -7,13 +7,13 @@ on:
 
 jobs:
   publish:
+    environment: 'pub.dev'
+    permissions:
+      id-token: write # Required for authentication using OIDC
     runs-on: ubuntu-latest
     steps:
-      - name: Checkout repo
-        uses: actions/checkout@v3
-      - name: Publish
-        uses: k-paxian/dart-package-publisher@master
+      - name: 📚 Git Checkout
+        uses: actions/checkout@v4
         with:
-          credentialJson: ${{ secrets.CREDENTIAL_JSON }}
-          flutter: true
-          skipTests: true
+          submodules: recursive
+      - uses: ./.github/actions/publish_flutter_package
\ No newline at end of file
\ No newline at end of file