chore: add summary to Action

Author: henryiii

action.yml

@@ -89,3 +89,24 @@ runs:
         ${{ inputs.only != ''        && format('--only "{0}"', inputs.only) || ''}}
       shell: pwsh
       if: runner.os == 'Windows'
+
+    - run: |
+        # Prepare summary
+        "${{ steps.python.outputs.python-path }}" -u << "EOF"
+        import os
+        from pathlib import Path
+
+        output_dir = Path("${{ inputs.output-dir != ''  && format('--output-dir "{0}"', inputs.output-dir) || ''}}" or 'wheelhouse')
+
+        with Path(os.environ["GITHUB_STEP_SUMMARY"]).open("w", encoding="utf-8") as f:
+          print("## Files in output directory", file=f)
+          print(file=f)
+          for item in output_dir.iterdir():
+            if item.is_file():
+              size_mb = item.stat().st_size / 1024**2
+              print(f"* `{item}` - {size_mb:.2f} MB", file=f)
+            else:
+              print(f"* `{item.name}/`", file=f)
+          print(file=f)
+        EOF
+      shell: bash