add maintenance workflow

this should keep the pubblic suffix state up to date

.github/workflows/maintain.yml

@@ -0,0 +1,45 @@
+name: run Maintenance script
+
+on:
+  schedule:
+  #   # * is a special character in YAML so you have to quote this string
+  #   # We'll run this weekly at 23.00 on Saturday.
+    - cron:  '0 23 * * 6'
+  workflow_dispatch:
+
+permissions:
+  contents: write
+  pull-requests: write
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: [3.11]
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v5
+        with:
+          python-version: ${{ matrix.python-version }}
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
+      - name: Maintain
+        run: |
+            python maintain.sh
+      - name: Create Pull Request
+        uses: peter-evans/create-pull-request@v7
+        with:
+          branch: create-pull-request/${{ steps.vars.outputs.branch_name }}
+          committer: dispoBot <martenson@dispobot>
+          commit-message: execution of maintenance script
+          title: maintenance script run
+          body: maintenance.sh has been executed and found a diff
+          labels: automated
+          assignees: martenson
+          reviewers: martenson