feat(reviewdog): add reusable workflow #46
                
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This pull request introduces a reusable GitHub Actions workflow for integrating Reviewdog, a tool for automated code review, and includes a minimal update to its documentation. The workflow is designed to be flexible, allowing customization through inputs and secrets.
GitHub Actions Workflow for Reviewdog:
.github/workflows/reviewdog.yml: Added a reusable workflow to run Reviewdog with configurable inputs such asreviewdog_app_id,reviewdog_private_key,tool_command, and others. It includes steps for repository checkout, token generation, and executing Reviewdog.Documentation Update:
reviewdog/README.md: Added a placeholder title for the Reviewdog documentation.