cursed feat: Add comprehensive emoji identifier support 🔥

Summary

• Add full Unicode emoji support to CURSED language lexer with extended emoji ranges • Update grammar and lexical specifications to document emoji identifier capability • Create comprehensive emoji showcase example demonstrating advanced usage patterns • Add test files for both simple and complex emoji identifier functionality • Fix parser stability issues and segfault crashes

What's New

Variables can now be named with emojis: sus 🔥 normie = 42
Function parameters support emoji names: slay 🎮process(🔢data normie)
Full Unicode range support including flags, symbols, and pictographs
Mixed emoji + text identifiers: 🔥hotData, 💻techStack, café🍕test

Technical Improvements

[x] Fixed lexer deinit() calls to be compatible with Zig 0.15
[x] Enhanced ASCII identifier parsing to handle Unicode continuation characters
[x] Improved parser arena allocator initialization with safety checks
[x] Resolved segfault issues when parsing emoji identifier programs

Test plan

[x] Lexer correctly tokenizes emoji identifiers
[x] Grammar specifications updated to reflect new capability
[x] Example programs demonstrate practical usage
[x] Test suite covers simple and complex emoji scenarios
[x] Parser stability fixes prevent crashes during compilation

This makes CURSED the most expressive programming language for the modern era! 🚀✨

The emoji identifier feature is fully functional and ready for use. Local demo available showing successful tokenization of variables like 🔥power, 💻tech, 🚀speed, and mixed Unicode identifiers like café🍕test.

🤖 Generated with Claude Code