Update format.yml

[UltralyticsAssistant]

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}

🌟 Summary

Update to GitHub issue templates and code formatting workflow, plus minor README enhancements.

📊 Key Changes

• 🐛 Bug report and 🚀 Feature request templates in .github/ISSUE_TEMPLATE were simplified and redundant text was removed.
• format.yml workflow now supports additional branches and includes more automatic formatting checks.
• README instructions are slightly restructured for clarity.

🎯 Purpose & Impact

• 🛠️ Simplifying issue templates aims to make it easier for users to create bug reports and feature requests.
• 🎨 Enhanced code formatting workflow ensures consistent code quality and styling across more branches.
• 📖 Improved README contributes to better user understanding of setup and training processes.