ci: add SHA256 checksum files to releases

Author: pabloinigoblasco

.github/workflows/build.yml

@@ -114,6 +114,21 @@ jobs:
           Compress-Archive -Path dist\* -DestinationPath "$env:ZIP_NAME"
           Write-Host "Package created: $env:ZIP_NAME"
 
+      - name: Generate checksum (Linux/macOS)
+        if: startsWith(github.ref, 'refs/tags/') && runner.os != 'Windows'
+        shell: bash
+        run: |
+          sha256sum "${{ env.ZIP_NAME }}" > "${{ env.ZIP_NAME }}.sha256"
+          cat "${{ env.ZIP_NAME }}.sha256"
+
+      - name: Generate checksum (Windows)
+        if: startsWith(github.ref, 'refs/tags/') && runner.os == 'Windows'
+        shell: pwsh
+        run: |
+          $hash = (Get-FileHash -Algorithm SHA256 "$env:ZIP_NAME").Hash.ToLower()
+          "$hash  $env:ZIP_NAME" | Out-File -Encoding ascii "$env:ZIP_NAME.sha256"
+          Get-Content "$env:ZIP_NAME.sha256"
+
       - name: Upload artifact
         if: startsWith(github.ref, 'refs/tags/')
         uses: actions/upload-artifact@v4
@@ -125,7 +140,9 @@ jobs:
         if: startsWith(github.ref, 'refs/tags/')
         uses: softprops/action-gh-release@v2
         with:
-          files: ${{ env.ZIP_NAME }}
+          files: |
+            ${{ env.ZIP_NAME }}
+            ${{ env.ZIP_NAME }}.sha256
           generate_release_notes: ${{ matrix.runner == 'ubuntu-22.04' }}
           fail_on_unmatched_files: false
         env: