[#24] Client: Add Ape manager

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

src/FrostFS.SDK.ClientV2/Models/Chain/FrostFsChain.cs

@@ -0,0 +1,16 @@
+using Google.Protobuf;
+
+namespace FrostFS.SDK.ClientV2
+{
+    public struct FrostFsChain (byte[] raw)
+    {
+        private ByteString? grpcRaw;
+
+        public byte[] Raw { get; } = raw;
+
+        internal ByteString GetRaw()
+        {
+            return grpcRaw ??= ByteString.CopyFrom(Raw);
+        }
+    }
+}