chore: add workflow to sync dependabot PRs to development

[guillermodotn]

Summary

Add a GitHub Actions workflow that cherry-picks merged dependabot PRs from master into development.

How it works

1. Triggered when a PR to master is merged.
2. Only runs if the PR was opened by dependabot[bot] and has the sync development label.
3. Cherry-picks the merge commit into the development branch and pushes it directly.
4. If the cherry-pick fails (e.g., due to conflicts), the workflow fails and sends the normal GitHub Actions failure notification.

Usage

1. Create a sync development label in the repository.
2. Add the label to a dependabot PR before merging.
3. On merge, the workflow automatically cherry-picks the commit into development.