feat: sync private repo

Author: 0marperez

.github/workflows/sync-mirror.yml

@@ -0,0 +1,24 @@
+name: Sync Mirror
+
+on:
+  push:
+    branches: [ main ]
+  workflow_dispatch:
+  # TODO: REMOVE v
+  pull_request:
+    branches: [ main ]
+  # TODO: REMOVE ^
+
+jobs:
+  git-sync:
+    if: github.repository == 'awslabs/aws-sdk-kotlin'
+    runs-on: ubuntu-latest
+    steps:
+      - name: git-sync
+        uses: wei/git-sync@v3
+        with:
+          source_repo: "awslabs/aws-sdk-kotlin"
+          source_branch: "main"
+          destination_repo: ${{ secrets.GIT_SYNC_DESTINATION_REPO }}
+          destination_branch: "main"
+          # destination_ssh_private_key:  ${{ secrets.GIT_SYNC_DESTINATION_SSH_PRIVATE_KEY }}