Add GitHub Copilot instructions for repository

[Copilot]

Configures Copilot instructions as documented in GitHub's best practices for coding agents.

Changes

• Created .github/copilot-instructions.md with repository-specific guidance:
  • Development setup (make targets, Python 3.10+ requirements)
  • Pre-commit hooks setup (make setup-precommit)
  • Code standards (Ruff formatting, mypy/pyright type checking, 88-char lines)
  • Testing conventions (pytest structure, markers for slow/java/python tests)
  • Running relevant tests before linting workflow
  • Development workflow (test → fix → lint → broader tests)
  • Conventional Commits format
  • Project structure (craft_parts/ modules, plugin system, state management)
  • Pydantic v2 patterns and security considerations
  • LGPL-3.0 license requirements

The file provides context-aware guidance for AI assistants working in this codebase.

• Fixes ✨ Set up Copilot instructions #1388

Original prompt

---

This section details on the original issue you should resolve

<issue_title>✨ Set up Copilot instructions</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 ✨ Set up Copilot instructions #1388

---

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[lengau]

@copilot Have use the Makefile to generate test commands that only run the relevant tests, and have it use those tests locally before linting

[Copilot]

@copilot Have use the Makefile to generate test commands that only run the relevant tests, and have it use those tests locally before linting

Updated the instructions to include:

1. Running Relevant Tests section with examples using uv run pytest for:

   • Specific modules/files
   • Directories
   • Test patterns
   • Fast tests for specific areas

2. Development Workflow section emphasizing the order:

   • Run relevant tests first
   • Fix failures
   • Run linters
   • Run broader tests before committing

Commit: 2292a20

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• canonical-bos01.cdn.snapcraftcontent.com
  • Triggering command: /usr/lib/snapd/snapd (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

[lengau]

@copilot Add the setup of precommit

[Copilot]

@copilot Add the setup of precommit

Added pre-commit setup section with:

• make setup-precommit command
• List of automatic checks (trailing whitespace, YAML/TOML syntax, ruff, prettier)
• Placed in Development Environment section after initial setup

Commit: 777ade9