chore(ci): add opencode commit updater workflow

Co-authored-by: Cursor <cursoragent@cursor.com>

Author: pRizz

.github/workflows/update-opencode-commit.yml

@@ -0,0 +1,39 @@
+name: Update Opencode Commit
+
+on:
+  workflow_dispatch:
+  schedule:
+    - cron: "0 2 * * *"
+
+permissions:
+  contents: write
+
+jobs:
+  update-opencode-commit:
+    name: Update Opencode Commit
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Configure Git
+        run: |
+          git config user.name "github-actions[bot]"
+          git config user.email "github-actions[bot]@users.noreply.github.com"
+
+      - name: Update opencode commit
+        run: |
+          ./scripts/update-opencode-commit.sh
+
+      - name: Commit and push if changed
+        run: |
+          if git diff --quiet; then
+            echo "No changes to commit."
+            exit 0
+          fi
+
+          git add packages/core/src/docker/Dockerfile
+          git commit -m "chore: update opencode commit"
+          git push