[#24] Client: Add Ape manager

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

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

@@ -0,0 +1,37 @@
+using System;
+
+using Frostfs.V2.Ape;
+
+namespace FrostFS.SDK.ClientV2
+{
+    public struct FrostFsChainTarget(FrostFsTargetType type, string name)
+    {
+        private ChainTarget? chainTarget;
+
+        public FrostFsTargetType Type { get; } = type;
+
+        public string Name { get; } = name;
+
+        internal ChainTarget GetChainTarget()
+        {
+            return chainTarget ??= new ChainTarget
+            {
+                Type = GetTargetType(Type),
+                Name = Name
+            };
+        }
+
+        private static TargetType GetTargetType(FrostFsTargetType type)
+        {
+            return type switch
+            {
+                FrostFsTargetType.Undefined => TargetType.Undefined,
+                FrostFsTargetType.Namespace => TargetType.Namespace,
+                FrostFsTargetType.Container => TargetType.Container,
+                FrostFsTargetType.User => TargetType.User,
+                FrostFsTargetType.Group => TargetType.Group,
+                _ => throw new ArgumentException("Unexpected value for TargetType", nameof(type)),
+            };
+        }
+    }
+}

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);
+        }
+    }
+}

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

@@ -0,0 +1,11 @@
+namespace FrostFS.SDK.ClientV2
+{
+    public enum FrostFsTargetType 
+    {
+        Undefined = 0,
+        Namespace,
+        Container,
+        User,
+        Group
+    }
+}