## Description:
+ Adds ML-KEM API surface
+ Implements the API with initial C implementation, with sprinkling of SSE/NEON for (I)NTT
+ Adds low level ML-KEM polynomial arithmetic testing which tests self-consistency and exercises internal assertion in debug builds
+ Adds multi-implementation functionality testing to enable comparative functionality and performance testing on E2E functionality
+ For now, comparison testing is just between SymCrypt static and dynamic, with 3rd party comparison with libcrux disabled until they publish a final ML-KEM implementation
+ Adds ML-KEM KATs from NIST
Related work items: #50913735
Samuel Lee