initial addition of essential crypto, encoders, workflows and LLM instructions

pkg/crypto/sha256/doc.go

@@ -0,0 +1,6 @@
+// Package sha256 is taken from github.com/minio/sha256-simd, implementing,
+// where available, an accelerated SIMD implementation of sha256.
+//
+// This package should be updated against the upstream version from time to
+// time.
+package sha256