Refactor: Extract tag setup to reusable GitHub Action

This commit extracts the logic for setting up the tag and updating `pubspec.yaml` into a reusable GitHub Action. This simplifies the main workflow file and promotes code reuse.

The `setup-tag` job has been removed from `release_flutter_app.yaml`, and its steps are now encapsulated in the new `.github/actions/setup-tag/action.yml` file.

The `build-android` and `build-ios` jobs now use this new reusable action.

Author: gabrielbmoro

.github/actions/setup-tag/action.yml

@@ -0,0 +1,16 @@
+name: 'Setup Tag'
+description: 'Reusable action to setup tag'
+
+runs:
+  using: "composite"
+  steps:
+    - name: Set up tag
+      shell: bash
+      run: |
+        TAG=${GITHUB_REF#refs/tags/}        # e.g., v1.2.3
+        echo "Using tag $TAG"
+        # Remove leading 'v' if present
+        VERSION=${TAG#v}
+        echo "Setting version to $VERSION"
+        # Update pubspec.yaml
+        sed -i "s/^version:.*/version: $VERSION+$BUILD_NUMBER/" pubspec.yaml

.github/workflows/release_flutter_app.yaml

@@ -6,30 +6,16 @@ on:
       - '*'  # Trigger on any new tag
 
 jobs:
-  setup-tag:
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout code
-        uses: actions/checkout@v4
-
-      - name: Set version from tag
-        run: |
-          TAG=${GITHUB_REF#refs/tags/}        # e.g., v1.2.3
-          echo "Using tag $TAG"
-          # Remove leading 'v' if present
-          VERSION=${TAG#v}
-          echo "Setting version to $VERSION"
-          # Update pubspec.yaml
-          sed -i "s/^version:.*/version: $VERSION+$BUILD_NUMBER/" pubspec.yaml
-
   build-android:
     runs-on: ubuntu-latest
-    needs: setup-tag
 
     steps:
       - name: Checkout code
         uses: actions/checkout@v4
 
+      - name: Set up tag
+        uses: ./.github/actions/setup-tag
+
       - name: Set up Flutter
         uses: ./.github/actions/setup-flutter
 
@@ -53,6 +39,9 @@ jobs:
       - name: Checkout code
         uses: actions/checkout@v4
 
+      - name: Set up tag
+        uses: ./.github/actions/setup-tag
+
       - name: Set up Flutter
         uses: ./.github/actions/setup-flutter