ci: move sync-to-gitee workflow to correct directory

- Move .sync-to-gitee.yml from .github/workflow/ to .github/workflows/
- Fix workflow file location to match GitHub Actions standard directory structure
- Ensure workflow is properly recognized and executed by GitHub Actions

.github/workflows/.sync-to-gitee.yml

@@ -0,0 +1,35 @@
+name: Sync All Branches to Gitee
+
+on:
+  push:
+    branches:
+      - '*'  
+
+jobs:
+  sync:
+    runs-on: ubuntu-latest
+    
+    steps:
+      - name: Checkout Source Code
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0 
+
+      - name: Sync All Branches
+        run: |
+          # 1. 配置 Git 用户信息
+          git config --global user.name "GitHub Actions"
+          git config --global user.email "actions@github.com"
+
+          # 2. 构建带 Token 的 HTTPS 远程地址
+          GITEE_URL="https://${{ secrets.GITEE_USERNAME }}:${{ secrets.GITEE_TOKEN }}@gitee.com/${{ secrets.GITEE_USERNAME }}/test-push-gitee.git"
+
+          # 3. 添加远程仓库 (命名为 gitee)
+          git remote add gitee $GITEE_URL
+
+          # 4. 遍历并推送所有分支
+          # 这一步会获取本地所有分支名，并依次推送到 Gitee
+          for branch in $(git branch -r | grep -v HEAD | sed 's/origin\///'); do
+            echo "Syncing branch: $branch"
+            git push -f gitee $branch:$branch
+          done