Adding a style guide to be followed for responses

It would be good if there were a way for CoPilot to retain the style guide we require

The issue does not name a file, test, or entry point. Start by mapping where Copilot response instructions are assembled and checking the existing issue context for an agreed design. Done is not defined by the report, so acceptance criteria for retaining and applying a style guide need to be established before implementation.

Written by the indexing model from the issue text.