fixed #12

.github/workflows/test-fmt.yaml

@@ -0,0 +1,55 @@
+name: Go Package CI
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v3
+
+    - name: Set up Go
+      uses: actions/setup-go@v3
+      with:
+        go-version: '1.22'
+
+    - name: Install dependencies
+      run: make deps
+
+    - name: Run all checks and tests
+      run: |
+        make test-all 
+        make check-examples
+
+  format:
+    needs: test
+    runs-on: ubuntu-latest
+    if: github.event_name == 'pull_request'
+    steps:
+    - uses: actions/checkout@v3
+
+    - name: Set up Go
+      uses: actions/setup-go@v3
+      with:
+        go-version: '1.22'
+
+    - name: Format code
+      run: make fmt
+
+    - name: Check for changes
+      id: git-check
+      run: |
+        git diff --exit-code || echo "changes=true" >> $GITHUB_OUTPUT
+
+    - name: Create Pull Request
+      if: steps.git-check.outputs.changes == 'true'
+      uses: peter-evans/create-pull-request@v5
+      with:
+        commit-message: Apply formatting changes
+        title: 'Auto-format Go code'
+        body: 'This PR applies automatic formatting to Go code.'
+        branch: auto-format-${{ github.head_ref }}