Try to add workflow to publish nightlies (#1276)

Author: Carreau

.github/workflows/nightly.yml

@@ -0,0 +1,32 @@
+name: nightly build and upload
+on:
+  workflow_dispatch:
+  schedule:
+    - cron: "0 0 * * *"
+
+defaults:
+  run:
+    shell: bash -eux {0}
+
+jobs:
+  build:
+    runs-on: "ubuntu-latest"
+    strategy:
+      fail-fast: false
+      matrix:
+        python-version: ["3.12"]
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Base Setup
+        uses: jupyterlab/maintainer-tools/.github/actions/base-setup@v1
+
+      - name: Build
+        run: |
+          python -m build
+      - name: Upload wheel
+        uses: scientific-python/upload-nightly-action@82396a2ed4269ba06c6b2988bb4fd568ef3c3d6b # 0.6.1
+        with:
+          artifacts_path: dist
+          anaconda_nightly_upload_token: ${{secrets.UPLOAD_TOKEN}}