[#24] Client: Implement pool part1

first iteration - base classes and methods

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

src/FrostFS.SDK.ClientV2/Poll/WrapperPrm.cs

@@ -0,0 +1,34 @@
+using System;
+using System.Security.Cryptography;
+
+using Grpc.Net.Client;
+
+using Microsoft.Extensions.Logging;
+
+namespace FrostFS.SDK.ClientV2;
+
+// wrapperPrm is params to create clientWrapper.
+[System.Diagnostics.CodeAnalysis.SuppressMessage("Performance", "CA1815:Override equals and operator equals on value types", Justification = "<Pending>")]
+public struct WrapperPrm
+{
+    internal ILogger? Logger { get; set; }
+
+    internal string Address { get; set; }
+
+    internal ECDsa? Key { get; set; }
+
+    internal ulong DialTimeout { get; set; }
+
+    internal ulong StreamTimeout { get; set; }
+
+    internal uint ErrorThreshold { get; set; }
+
+    internal Action ResponseInfoCallback { get; set; }
+
+    internal Action PoolRequestInfoCallback { get; set; }
+
+    internal GrpcChannelOptions GrpcChannelOptions { get; set; }
+
+    internal ulong GracefulCloseOnSwitchTimeout { get; set; }
+}
+