onnxruntime

74a33539 - feat: Add BFloat16 support for Gemm and MatMul CPU operators

feat: Add BFloat16 support for Gemm and MatMul CPU operators This commit introduces BFloat16 support for Gemm and MatMul operators on the CPU execution provider. Key changes: - Added BFloat16 data type and moved related files to onnxruntime/core/common. - Implemented MlasBf16AccelerationSupported to detect hardware support for BFloat16. - Added Gemm and MatMul kernels for BFloat16 using Eigen. - Registered the new kernels for the CPU execution provider. - Added unit tests for BFloat16 Gemm and MatMul. - Fixed ambiguous comparison operators for BFloat16.