sdist test workflow

Author: Tieqiong

.github/workflows/sdist.yml

@@ -0,0 +1,23 @@
+name: Tests build sdist
+
+on:
+  push:
+  pull_request:
+  workflow_dispatch:
+
+jobs:
+  build_sdist:
+    name: Build diffpy.pdffit2 sdist
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          ref: ${{ github.ref }}
+
+      - name: Build sdist
+        run: pipx run build --sdist
+
+      - uses: actions/upload-artifact@v4
+        with:
+          name: cibw-sdist
+          path: ./dist/*.tar.gz