Add Ultralytics actions workflow in `format.yml`

This pull request adds a workflow to automatically format code and documentation.

🛠️ PR Summary

_{Made with ❤️ by Ultralytics Actions}

Adding an automatic code and documentation formatting workflow.

🆕 New formatting workflow file under .github/workflows/format.yml.
🔄 Workflow triggers on pushes and pull requests to the main and master branches.
🖥️ The workflow utilizes the latest Ubuntu runner for execution.
🏗️ It includes steps for checking out the repo and running the Ultralytics formatting action.

💻 Consistency: Ensures code and documentation style remain consistent across contributions.
↩️ Ease of Contribution: Reduces manual effort for contributors to comply with formatting standards.
🔧 Automation: Streamlines the integration process for new code contributions, facilitating smoother and faster merges into the main branch.
👥 Enhanced Collaboration: Helps maintain a cleaner codebase, making it easier for developers to understand and work with the code.