[#26] All: Remove V2 from naming

Rename project, namespaces and class names

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

src/FrostFS.SDK.Client/Models/Response/MetaHeader.cs

@@ -0,0 +1,20 @@
+namespace FrostFS.SDK;
+
+public class MetaHeader(FrostFsVersion version, int epoch, int ttl)
+{
+    public FrostFsVersion Version { get; set; } = version;
+    public int Epoch { get; set; } = epoch;
+    public int Ttl { get; set; } = ttl;
+
+    public static MetaHeader Default()
+    {
+        return new MetaHeader(
+            new FrostFsVersion(
+                major: 2,
+                minor: 13
+            ),
+            epoch: 0,
+            ttl: 2
+        );
+    }
+}