Rubik's Cube Simulator v0.2.0

🚀 Performance Improvements

Solver is now 400x - 19,000x faster through DataTable caching and instant solution returns:

Test Case	Before	After	Improvement
1 move	5+ seconds	12ms	400x faster
2 moves	5+ seconds	256µs	19,000x faster
Test suite	timeout	10-20ms	Fixed ✓

• Lookup tables (6.6 MB) cached to ~/.cache/rubik_solver_table.bin
• Removed timeout to return immediately upon finding solutions
• Solver returns ≤20 move solutions (fast, but not always optimal)

🔧 Improvements

• Rust 2024 Edition: Updated to latest Rust edition
• Code Cleanup: Removed dead code (idas.rs), fixed all Clippy warnings, simplified solver
• Optional Graphics: Bevy now optional via graphics feature flag
• Faster CI: Tests run with --no-default-features, no ALSA dependencies needed
• Memory: Core solver uses only 13 MB (vs 462 MB with Bevy graphics)

🐛 Bug Fixes

• Fixed stack overflow in tests
• Fixed slow solver performance due to timeouts
• Fixed Clippy compilation warnings

📦 Breaking Changes

None. Fully backward compatible.