add automated publishing

.github/workflows/publish.yml

-name: Publish to pub.dev
+name: Publish Flutter package to pub.dev
+description: Publish your Flutter package to pub.dev
 
-on:
-  push:
-    tags:
-      - 'v[0-9]+.[0-9]+.[0-9]+*'
+inputs:
+  working-directory:
+    description: directory with-in the repository where the package is located (if not in the repository root)
+    required: false
 
-jobs:
+runs:
+  using: "composite"
   steps:
-    - name: Install Flutter
-      run: |
-        git clone https://github.com/flutter/flutter.git -b stable --depth 1
-        export PATH="$PATH:`pwd`/flutter/bin"
-        flutter doctor
+    - name: 📚 Git Checkout
+      uses: actions/checkout@v4
+    - name: 🐦 Setup Flutter
+      uses: subosito/flutter-action@v2
 
-  publish:
-    permissions:
-      id-token: write # Required for authentication using OIDC
-    uses: dart-lang/setup-dart/.github/workflows/publish.yml@v1
-    # with:
-    #   working-directory: path/to/package/within/repository
+    - 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)
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+
+    - 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 }}
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