Add periodic indexing workflow

Author: zsol

.github/workflows/update-index.yml

@@ -0,0 +1,30 @@
+on:
+  schedule:
+    - cron: "31 * * * *"
+jobs:
+  update_index:
+    runs-on: ubuntu-latest
+    steps:
+      - name: fetch pages
+        uses: actions/checkout@v4
+        with:
+          ref: pages
+          path: pages
+      - name: checkout main
+        uses: actions/checkout@v4
+        with:
+          path: main
+      - name: setup python
+        uses: actions/setup-python@v5
+        with:
+          python-version: 3.12
+      - name: Install hatch
+        run: python -m pip install hatch
+      - name: Index
+        run: cd main; python -m hatch run py-wtf index-since --since $(date -d '1hour ago' '+%Y-%m-%d %H:%M:%S') ../pages
+      - name: commit
+        run: |
+          git config user.name "github-actions[bot]"
+          git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
+          git commit -am 'Auto-generated index'
+          git push