Enforce Coding Conventions with Copilot

A workflow to establish and maintain coding conventions using Copilot for consistency.

## Steps:

1. Write a concise style guide.

2. Add a comment at the top of a file linking to it.

3. Ask Copilot: "Rewrite this file to follow our style guide."

4. Fix major issues manually.

5. Ask Copilot: "Highlight style violations in this diff."

6. Turn recurring issues into lint rules.

7. Update the style guide as conventions evolve.