Create mirror_to_codeberg.yml (#23)

* Create mirror_to_codeberg.yml

Shamelessly ~~stolen~~ borrowed from https://github.com/Lissy93/dashy/blob/master/.github/workflows/mirror.yml

* bump to v6

* Potential fix for code scanning alert no. 2: Workflow does not contain permissions

Co-authored-by: Copilot Autofix powered by AI <62310815+github-advanced-security[bot]@users.noreply.github.com>

---------

Co-authored-by: Copilot Autofix powered by AI <62310815+github-advanced-security[bot]@users.noreply.github.com>

Author: EvilOlaf

.github/workflows/mirror_to_codeberg.yml

@@ -0,0 +1,18 @@
+# Pushes the contents of the repo to the Codeberg mirror
+name: 🪞 Mirror to Codeberg
+permissions:
+  contents: read
+on:
+  workflow_dispatch:
+  schedule:
+    - cron: '30 3 * * 0' # At 03:30 on Sunday
+jobs:
+  codeberg:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v6
+        with: { fetch-depth: 0 }
+      - uses: pixta-dev/repository-mirroring-action@v1
+        with:
+          target_repo_url: git@codeberg.org:EvilOlaf/scum.git
+          ssh_private_key: ${{ secrets.GHA_SSH_KEY }}