[WIP] Set up Copilot instructions for the repository

[Copilot]

Thanks for assigning this issue to me. I'm starting to work on it and will keep this PR's description up to date as I form a plan and make progress.

Original prompt

---

This section details on the original issue you should resolve

<issue_title>✨ Set up Copilot instructions<issue_title>copilot-setup-steps</issue_title>
@copilot<issue_description>/.github/copilot-instructions.md
/.github/instructions/**/*.instructions.md
**/AGENTS.md
/CLAUDE.md
/GEMINI.md</issue_description>@copilot </issue_title>
<issue_description>Configure instructions for this repository as documented in Best practices for Copilot coding agent in your repository.

</issue_description>

Comments on the Issue (you are @copilot in this section)

Fixes #209

---

✨ Let Copilot coding agent set things up for you — coding agent works faster and does higher quality work when set up for your repo.

[joe10832]

@copilot

[joe10832]

@copilot

[joe10832]

@copilot