WIP: Integrate copilot instructions for using HONC

[brettimus]

This PR will add files to the various templates that support using HONC with the following Copilot-y IDEs:

• Cursor (.cursorrules)
• Windsurf (.windsurfrules)
• GitHub Copilot (.github/copilot-instructions.md)

TODO

• Investigate how to leverage .cursor/rules folder (details below)

• Investigate snippets that can be @ mentioned inside IDE

.cursor/rules explained

From the changelog:

.cursor/rules: Users can write several repository-level rules to disk in the .cursor/rules directory. The Agent will automatically choose which rule to follow.

A database of rules that cursor agent can select from (or you can @-mention when you are using chat/composer)

These files are in .mdc and look like this:

---
description:
globs:
---

# Your rule content

- You can @ files here
- You can use markdown but dont have to

You can manually add them in the settings page for Cursor.