Add workflow to sync fork with upstream repository

Author: Fanju6

.github/workflows/main.yml

@@ -0,0 +1,32 @@
+name: Sync Fork with Upstream
+
+on:
+  schedule:
+    - cron: '0 0 * * *'
+  workflow_dispatch: 
+
+jobs:
+  sync:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout Fork
+        uses: actions/checkout@v4
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          fetch-depth: 0
+
+      - name: Sync with Upstream
+        run: |
+          git config user.name "github-actions[bot]"
+          git config user.email "github-actions[bot]@users.noreply.github.com"
+          
+          # 添加上游仓库
+          git remote add upstream https://github.com/Fanju6/NetProxy-Magisk.git
+          git fetch upstream
+          
+          # 合并上游 main 分支
+          git checkout main
+          git merge upstream/main --no-edit
+          
+          # 推送到 Fork
+          git push origin main