ci: update sync process for stable branch to main

This commit modifies the GitHub Actions workflow to create a pull request for syncing changes from the stable branch to the main branch. It checks for existing open pull requests and only creates a new one if necessary, improving the automation and efficiency of the release process.

Author: caio-pizzol

.github/workflows/release-package.yml

@@ -52,14 +52,22 @@ jobs:
         run: |
           pnpm dlx semantic-release
 
-      - name: Sync stable back to main
+      - name: Create sync PR to main
         if: github.ref == 'refs/heads/stable'
         env:
           GITHUB_TOKEN: ${{ steps.generate_token.outputs.token }}
+          GH_TOKEN: ${{ steps.generate_token.outputs.token }}
         run: |
-          git config user.name "github-actions[bot]"
-          git config user.email "github-actions[bot]@users.noreply.github.com"
-          git fetch origin main stable
-          git checkout main
-          git merge origin/stable -m "chore: sync stable release to main"
-          git push origin main
+          pr_number=$(gh pr list --base main --head stable --state open --json number --jq '.[0].number')
+          if [ -z "$pr_number" ]; then
+            git fetch origin main
+            if git diff --quiet origin/main...HEAD; then
+              echo "Main is already up to date with stable; skipping PR."
+              exit 0
+            fi
+            pr_number=$(gh pr create --base main --head stable --title "chore: sync stable release to main" --body "Automated PR to merge the latest stable changes back into main." --json number --jq '.number')
+            echo "Created PR #$pr_number to sync stable into main."
+          else
+            echo "PR #$pr_number already open to sync stable into main."
+          fi
+          gh pr merge "$pr_number" --merge --auto || echo "Auto-merge setup skipped (conditions not met)."