[#4] infrastructure and sample Client Cut

Signed-off-by: Pavel Gross <p.gross@yadro.com>

src/FrostFS.SDK.ClientV2/Mappers/GRPC/ObjectId.cs

@@ -13,4 +13,9 @@ public static class ObjectIdMapper
             Value = ByteString.CopyFrom(objectId.ToHash())
         };
     }
+
+    public static ObjectId ToModel(this ObjectID objectId)
+    {
+        return ObjectId.FromHash(objectId.Value.ToByteArray());
+    }
 }