Add comprehensive GitHub Copilot instructions for CONSIM consciousness simulation

[Copilot]

This PR adds a comprehensive .github/copilot-instructions.md file that provides GitHub Copilot with detailed instructions for working effectively in the CONSIM consciousness simulation codebase.

What's Included

The instructions file contains exhaustively validated guidance covering:

Build & Test Workflow:

• Python dependency installation (pip install -r requirements.txt - 15-30 seconds)
• Core engine testing (python src/lattice_demo.py - ~0.05 seconds)
• Demo server startup (python demo_server.py - ~3 seconds)
• Production server startup (python run_server.py - ~3 seconds)

Manual Validation Requirements:

• Browser interaction testing with consciousness node creation
• API endpoint validation (/api/status, /api/stats, /api/nodes)
• Real-time simulation verification
• Performance benchmarks (lattice updates <10ms, API responses <100ms)

Repository Navigation:

• Complete file structure documentation
• Key component locations (lattice engine, WebGL renderer, API server)
• GitHub Pages deployment process
• Live demo access at https://jacobcdsmith.github.io/CONSIM

Troubleshooting Guide:

• Common port conflicts and resolution
• Module import errors and directory requirements
• Performance optimization recommendations
• Debug commands with proper timeouts

Validation Completed

All commands and scenarios have been tested and timed:

• ✅ Python dependencies install successfully
• ✅ Core consciousness engine runs mathematical calculations correctly
• ✅ Demo and production servers start reliably
• ✅ API endpoints return valid JSON responses
• ✅ Browser interface loads and accepts user interactions
• ✅ Real-time consciousness simulation updates work correctly

The instructions follow an imperative tone ("Run this command", "Always test this scenario") and include explicit "NEVER CANCEL" warnings with appropriate timeout values for all operations.

Fixes #14.

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