[#1] Move files to top level directory

Signed-off-by: Ivan Pchelintsev <i.pchelintsev@yadro.com>

src/FrostFS.SDK.Cryptography/UUID.cs

@@ -0,0 +1,17 @@
+using Google.Protobuf;
+
+namespace FrostFS.SDK.Cryptography
+{
+    public static class UUIDExtension
+    {
+        public static Guid ToUuid(this ByteString id)
+        {
+            return Guid.Parse(Convert.ToHexString(id.ToByteArray()));
+        }
+        
+        public static byte[] ToBytes(this Guid id)
+        {
+            return Convert.FromHexString(id.ToString("N"));
+        }
+    }
+}