Update Play Keyboard README

[yj7272098]

Description

This PR updates the Play Keyboard README.

• Refresh the Play Keyboard introduction
• Improve formatting and readability

Types of Changes

• Core
• Bugfix
• New feature
• Enhancement/optimization
• Keyboard (addition or update)
• Keymap/layout (addition or update)
• Documentation

Issues Fixed or Closed by This PR

N/A

Checklist

• My code follows the code style of this project.
• I have read the PR Checklist document and have made the appropriate changes.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• I have tested the changes and verified that they work and don't break anything (as well as I can manage).

[tzarc]

Honestly I think we'd be more likely to want to remove this file entirely.

[yj7272098]

Honestly I think we'd be more likely to want to remove this file entirely.

Thanks for the feedback. If the preference is to remove it, I'm happy to do that. I originally updated it because the existing content was outdated.