feat(Maths): add baby-step giant-step discrete log

[felipeofdev-ai]

Description

Adds Maths/BabyStepGiantStep.js implementing baby-step giant-step discrete logarithm modulo a prime.

Reference: https://en.wikipedia.org/wiki/Baby-step_giant-step

Checklist

• I have read CONTRIBUTING.md
• Tests added (Vitest)
• DIRECTORY.md updated

---

— Felipe Fernandes · Systems & Agentic AI Engineer
https://github.com/felipeofdev-ai · https://felipeofdev-ai.github.io/

[codecov-commenter]

Codecov Report

❌ Patch coverage is 95.58824% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 85.95%. Comparing base (5c39e87) to head (296b78d).

Files with missing lines	Patch %	Lines
Maths/BabyStepGiantStep.js	95.58%	3 Missing ⚠️

Additional details and impacted files

@@ Coverage Diff @@## master #1914 +/- ##
==========================================
+ Coverage 85.91% 85.95% +0.03% 
==========================================
Files 379 380 +1 Lines 19778 19846 +68 Branches 3016 3036 +20 ==========================================
+ Hits 16993 17058 +65 - Misses 2785 2788 +3 

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