Copilot init

Create or refresh Copilot bootstrap assets for the current repository. Derive all guidance from the repository itself and from files already present in the repo. Do not paste generic templates without adapting them.

Goal

Produce a minimal, high-signal set of bootstrap and validation assets:

• .github/workflows/copilot-setup-steps.yml
• focused lint/check/test workflows when the repository does not already have the right coverage
• .github/instructions/*.instructions.md
• .github/skills/*/SKILL.md

Keep startup guidance short, keep detailed repo-wide guidance in a single canonical place when the repository has one, and avoid duplicating large rule blocks across files.

Workflow