Support msvc and others

[juny2400]

Newly supported features:

1. MSVC build and options.
2. Secretkey(or sensitive data) zeroization.
3. Custom random sampler. (ex. sodium/blake3)
4. Preset template objects. (Encryptor / Decryptor / KeyGenerator)

[Copilot]

Pull request overview

This PR refactors a CKKS homomorphic encryption library to support MSVC builds, adds secret key zeroization, introduces a custom random sampler interface (with sodium/blake3 examples), and creates preset template objects for Encryptor/Decryptor/KeyGenerator. The Context class is replaced with direct preset accessor functions and PresetTraits.

Changes:

• Replaced the Context shared-pointer indirection with direct get_*() preset accessor functions and compile-time PresetTraits, removing Context.hpp entirely.
• Added SecretKey::zeroize() for secure memory clearing with multiple backend options (libsodium, OpenSSL, native, fallback), and a RandomGenerator abstraction with factory pattern for pluggable RNG.
• Added MSVC 128-bit integer emulation (u128/i128 structs), float-precision message types (FMessage/FCoeffMessage), and Windows CI support.

Reviewed changes

Copilot reviewed 66 out of 66 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
include/deb/utils/Basic.hpp	MSVC u128/i128 emulation, subIfGEConst
include/deb/utils/Macro.hpp	deb_secure_zero inline function, platform detection
include/deb/utils/RandomGenerator.hpp	New abstract RNG interface and factory
include/deb/utils/AleaRandomGenerator.hpp	Alea-backed RNG implementation
include/deb/utils/PresetTraits.hpp	Compile-time preset traits with ModArith
include/deb/utils/OmpUtils.hpp	OMP utils moved to deb::utils namespace
include/deb/utils/FFT.hpp	Non-template FFT class with template methods
include/deb/utils/ModArith.hpp	Templatized ModArith on degree
include/deb/utils/Constant.hpp	Moved to deb::utils namespace
include/deb/Preset.hpp	New preset variant map and accessor functions
include/deb/CKKSTypes.hpp	Float message types, removed Context dependency, inline accessors
include/deb/Encryptor.hpp	Template class EncryptorT<P>
include/deb/Decryptor.hpp	Template class DecryptorT<P>
include/deb/Serialize.hpp	FMessage/FCoeffMessage serialization support
include/deb/SeedGenerator.hpp	Uses RandomGenerator instead of alea directly
include/deb/SecretKeyGenerator.hpp	Removed Context dependency
include/deb/Context.hpp	Deleted
include/deb/utils/Span.hpp	Deleted
src/*.cpp	Updated to use preset accessors, new RNG, zeroization
test/*.cpp	Updated tests for new APIs, added float and operation tests
examples/*.cpp	Updated for new API, added CustomRNG example
benchmark/*.cpp	Updated benchmarks, added blake3 RNG benchmark
CMakeLists.txt	MSVC support, secure zero options, version bump to 0.3.0
CMakePresets.json	Added ci-win preset
.github/workflows/main.yml	Added Windows CI

Comments suppressed due to low confidence (1)

include/deb/utils/Macro.hpp:180

• Spelling error: "seted" should be "set".

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