Added backup workflow

.forgejo/workflows/backup-repo.yaml

@@ -0,0 +1,39 @@
+name: Git Backup to WebDAV
+on:
+  push:
+    # This ensures it runs on every branch push
+    branches:
+      - '**'
+jobs:
+  print-content:
+    runs-on: debian-latest
+    steps:
+      - name: checkout code
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: archive repository
+        run: |
+          PROJECT_NAME=$(echo "${{ github.repository }}" | cut -d'/' -f2)
+          BRANCH_NAME=$(echo "${{ github.ref_name }}" | sed 's/\//-/g')
+          TIMESTAMP=$(date +'%Y-%m-%d_%H-%M')
+
+          # Create the local variable
+          FINAL_NAME="${PROJECT_NAME}_${BRANCH_NAME}_${TIMESTAMP}.tar.gz"
+
+          # CRITICAL: Save it for the next step
+          echo "PROJECTNAME=$PROJECT_NAME" >> $GITHUB_ENV
+          echo "FILENAME=$FINAL_NAME" >> $GITHUB_ENV
+
+          # Create the archive
+          git archive --format=tar.gz -v -o "$FINAL_NAME" HEAD
+          echo "Archive created: $FINAL_NAME"
+
+      - name: Upload via Curl
+        run: |
+          ls -lh "$FILENAME"
+
+          curl -T "$FILENAME" \
+          -u "${{ secrets.WEBDAV_USER }}:${{ secrets.WEBDAV_PASSWORD }}" \
+          "${{ secrets.WEBDAV_URL }}/$PROJECTNAME/$FILENAME"