Add msvc build option and others

[leejonghyeong]

1. Build with MSVC
2. Add safe_memzero function
3. Fix rejection sampling range
4. Update the copyright year

[Copilot]

Pull request overview

Adds MSVC-friendly build support while introducing a secure memory-zeroing routine and fixing an off-by-one/range issue in rejection sampling.

Changes:

• Add safe_memzero() implementation and route safe_free() through it.
• Adjust rejection sampling loop bounds to avoid underflow and correct the sampling range.
• Update tests/CMake/README for MSVC compatibility (VLA removal in tests, conditional libm linking).

Reviewed changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 7 comments.

Show a summary per file

File	Description
test/functionality-test.c	Removes VLA usage (MSVC-incompatible) by switching to heap allocation; adjusts test constants/macros.
src/alea.c	Fixes rejection sampling loop bounds/range calculation.
src/alea-internal.h	Declares safe_memzero() and updates safe_free() to use it.
src/alea-internal.c	Adds cross-platform secure memory-zeroing implementation.
README.md	Reformats build options table (currently with markdown issues).
CMakeLists.txt	Adds alea-internal.c, makes libm conditional, adds MSVC link option.
.pre-commit-config.yaml	Bumps pre-commit hook versions.

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