⚡ Optimize Cargo Parser Regex Compilation

[mudcube]

💡 What: Replaced the local Regex::new call in parse_cargo_install_list with a static std::sync::OnceLock<Regex>. This ensures the regex is compiled only once and reused across all function calls.

🎯 Why: The previous implementation recompiled the regex every time parse_cargo_install_list was called. Since this function is called during package detection, repeated calls would unnecessarily consume CPU cycles compiling the same regex pattern.

📊 Measured Improvement:
I created a micro-benchmark running parse_cargo_install_list 10,000 times with a sample input.

• Baseline: ~3.09 seconds
• Optimized: ~0.077 seconds
• Speedup: ~40x improvement for this specific function.

This change is safe as OnceLock is thread-safe and the regex pattern is constant. The use of .expect() for the static regex is appropriate as compilation failure for a hardcoded valid pattern would indicate a critical environment issue or bug, effectively similar to the previous behavior but with better performance.

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PR created automatically by Jules for task 9482858837940197823 started by @mudcube

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