chore: add atomgit mirror

Author: jiacai2050

.github/CODEOWNERS

@@ -1,2 +1,3 @@
 # https://docs.github.com/en/repositories/managing-your-repositorys-settings-and-features/customizing-your-repository/about-code-owners#example-of-a-codeowners-file
-*       @jiacai2050 @xihale
+
+*       @jiacai2050 @xihale @jinzhongjia

.github/workflows/mirror.yml

@@ -16,3 +16,14 @@ jobs:
           fetch-depth: 0
       - run: |
           git push --tags --force https://${{ secrets.CBTOKEN }}@codeberg.org/jiacai2050/zigcc.git "refs/remotes/origin/*:refs/heads/*"
+
+  atomgit:
+    if: github.repository_owner == 'zigcc'
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+      - uses: pixta-dev/repository-mirroring-action@v1
+        with:
+          target_repo_url: https://jiacai2050:${{ secrets.ATOMGIT_TOKEN }}@atomgit.com/${{ github.repository }}.git