Implement Memory Game with Colors in Python

[Copilot]

This PR implements a complete Memory Game solution as requested in the challenge requirements, using Python as the programming language and Colors as the card theme.

What was implemented

Core Game Features:

• 4×4 and 6×6 grid options with 16 and 36 cards respectively
• Color-based cards featuring 8+ distinct colors (Red, Blue, Green, Yellow, Magenta, Cyan, Orange, Purple, etc.)
• 1-2 player support with individual score tracking and turn management
• Card matching mechanics with flip-to-reveal and match detection
• Win condition detection when all pairs are successfully matched

Technical Implementation:

• memory_game_console.py - Main console-based game with full ANSI color support
• memory_game.py - GUI version using tkinter for environments that support it
• Clean object-oriented design with proper game state management
• Input validation and error handling for robust gameplay

Quality Assurance:

• test_memory_game.py - Comprehensive automated test suite covering all game mechanics
• demo.py - Automated demonstration showing complete gameplay
• README.md - Complete documentation with usage instructions and feature overview
• All tests pass successfully validating the implementation

Game Mechanics Verified:

• ✅ Random card shuffling and grid placement
• ✅ Player input handling with coordinate system (row,col format)
• ✅ Visual card revealing with color representation
• ✅ Match detection logic with scoring
• ✅ Player turn switching in 2-player mode
• ✅ Complete game flow from start to win condition

The implementation follows all requirements from challenges/memorygame/memorygame.md including the specified programming language (Python), card theme (Colors), and all development steps outlined in the challenge.

Fixes #5.

---

💬 Share your feedback on Copilot coding agent for the chance to win a $200 gift card! Click here to start the survey.

[Copilot]

@mpchenette 👋 This repository doesn't have Copilot instructions. With Copilot instructions, I can understand the repository better, work faster and produce higher quality PRs.

I can generate a .github/copilot-instructions.md file for you automatically. Click here to open a pre-filled issue and assign it to me. I'll write the instructions, and then tag you for review.