[Tcode-Motion]

🎯 What: Extracted inline function callbacks in register_math into top-level standalone functions in stdlib/src/math.rs.
💡 Why: Reduces register_math function length and complexity, making math standard library registration cleaner, more readable, and consistent with other stdlib modules like strings.rs.
✅ Verification: Ran cargo fmt --all, cargo test -p techscript_stdlib, and full workspace tests cargo test --workspace --all-targets.
✨ Result: Reduced register_math line length from ~195 lines to ~20 lines while preserving all functionality and test passes.

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PR created automatically by Jules for task 2303837103390485077 started by @Tcode-Motion

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