[WIP] ✨ Set up Copilot instructions

[Copilot]

• Explore repository structure and understand codebase
• Test Python environment and dependencies installation (pip install -r dev-requirements.txt takes ~1 minute)
• Test pytest execution (runs in ~4 seconds, 1 test passes)
• Test linting tools (black, isort, flake8 work but show formatting issues)
• Validate pre-commit hooks and CI workflow understanding
• Test manual scenarios and functionality validation
• Document all validated commands with exact timeouts and requirements
• Create comprehensive .github/copilot-instructions.md file
• Final validation of all documented commands

Successfully created comprehensive .github/copilot-instructions.md with exhaustively validated commands:

Bootstrap & Setup:

• Python 3.10.6+ requirement with exact install commands
• pip install -r dev-requirements.txt (~1 minute, 10+ minute timeout)
• Dependencies: asterisk-ami, pytest-homeassistant-custom-component, pre-commit
• Network timeout warning for PyPI access documented

Development Workflow (all timings measured):

• pre-commit install (~1 second)
• Formatting: black custom_components tests + isort custom_components tests (~1 second each)
• Testing: pytest -v (~4 seconds, 30+ second timeout recommended)
• Linting: flake8 custom_components tests (~1 second, known issue documented)

Manual Testing Scenarios:

• Config flow testing with AMI credentials (host, port 5038, username, password)
• Device discovery verification (SIP/PJSIP devices)
• Real-time updates monitoring (device states, DTMF, connected line info)

Complete Project Structure:

• custom_components/asterisk/ breakdown (8 files: init.py, config_flow.py, const.py, base.py, sensor.py, binary_sensor.py, diagnostics.py, manifest.json)
• Test structure using pytest-homeassistant-custom-component framework
• CI workflow details (hassfest + pytest on Python 3.10.11/3.11.3)

Validation Requirements:

• Combined command: black custom_components tests && isort custom_components tests && flake8 custom_components tests
• Always run tests after changes: pytest -v
• NEVER CANCEL warnings for all operations >2 minutes

Key Features:

• Home Assistant custom integration for Asterisk PBX systems
• AMI (Asterisk Manager Interface) connection management
• Real-time SIP/PJSIP device state monitoring
• DTMF detection and telephony event tracking
• HACS distribution support

All commands exhaustively tested and validated with exact timing measurements. Instructions follow imperative tone and include comprehensive troubleshooting section.

Fixes #116.

---

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