Add scheduled release workflow

[fizyk]

base on actions-reuse/.github/workflows/shared-release-schedule.yml

.. code-block:: yaml

    name: Scheduled release
    on:
      schedule:
        - cron: '17 6 1 * *'
        - cron: '17 6 * * 1'
      workflow_dispatch: {}

    jobs:
      schedule:
        uses: fizyk/actions-reuse/.github/workflows/shared-release-schedule.yml@v5.3.2
        with:
          dependency-manager: 'uv'
        secrets:
          app_id: ${{ secrets.RELEASE_APP_ID }}
          private_key: ${{ secrets.RELEASE_APP_PRIVATE_KEY }}

---

Copied from fizyk/pyramid_basemodel#790