Create format.yml

[glenn-jocher]

This pull request adds an improved Ultralytics Actions workflow to automatically format code and documentation to the new Ultralytics official standards maintained at https://github.com/ultralytics/actions.

Four individual actions are run by default. To disable actions, set them to false, i.e. 'python: false'.

To customize an action use a pyproject.toml file in this repo, and see the individual action repo for details.

name: Ultralytics Actions

on:
  push:
    branches: [main]
  pull_request:
    branches: [main]

jobs:
  format:
    runs-on: ubuntu-latest
    steps:
      - name: Run Ultralytics Formatting
        uses: ultralytics/actions@main
        with:
          python: true
          docstrings: true
          markdown: true
          spelling: true

🛠️ PR Summary

_{Made with ❤️ by Ultralytics Actions}

WARNING ⚠️ this PR is very large, summary may not cover all changes.

🌟 Summary

Streamlined GitHub Actions YAML configuration and CONTRIBUTING.md updates

📊 Key Changes

• Added an automated workflow format.yml for code formatting.
• Reduced clutter in CONTRIBUTING.md, improving readability.
• Modified benchmarks.py, classify/predict.py, classify/train.py, README.md, README.zh-CN.md and other files for minor improvements and code clean-up.
• Introduced .github/workflows/format.yml for enforcing style guidelines.

🎯 Purpose & Impact

• 🧹 Maintains consistent code formatting automatically, ensuring code quality.
• 📖 Simplifies contribution documentation, making it easier to contribute.
• ✨ Provides general codebase cleanup, resulting in cleaner, more maintainable code.
• 🚀 Automates formatting tasks, potentially increasing the productivity of developers.