[#25] Client: Implement Patch and Range methods

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

src/FrostFS.SDK.ClientV2/Models/Object/FrostFsRange.cs

@@ -0,0 +1,27 @@
+namespace FrostFS.SDK;
+
+public readonly struct FrostFsRange(ulong offset, ulong length) : System.IEquatable<FrostFsRange>
+{
+    public ulong Offset { get; } = offset;
+
+    public ulong Length { get; } = length;
+
+    public override readonly bool Equals(object obj) => this == (FrostFsRange)obj;
+
+    public override readonly int GetHashCode() => $"{Offset}{Length}".GetHashCode();
+
+    public static bool operator ==(FrostFsRange left, FrostFsRange right)
+    {
+        return left.Equals(right);
+    }
+
+    public static bool operator !=(FrostFsRange left, FrostFsRange right)
+    {
+        return !(left == right);
+    }
+
+    public readonly bool Equals(FrostFsRange other)
+    {
+        return this == other;
+    }
+}