Add mirror workflow for scheduled and manual runs

.github/workflows/mirror.yml

@@ -0,0 +1,28 @@
+on:
+  schedule:
+  - cron: "0,20,40 * * * *"
+  workflow_dispatch:
+
+permissions:
+  contents: write
+
+jobs:
+  pull_remote:
+    name: mirror shenjack.top
+    runs-on: ubuntu-latest
+    steps:
+      - name: just checkout
+        uses: actions/checkout@v4
+        
+      - name: clone remote
+        shell: pwsh
+        run: |
+          git config --global user.email 3695888@qq.com
+          git config --global user.name shenjack-action
+          git remote add gitea http://shenjack.top:5100/ARS/ars-tools.git
+          git fetch gitea
+          for branch in $(git branch -r | grep -v '\->'); do
+            git branch --track ${branch#origin/} $branch
+          done
+          git pull --all
+          git push origin --all