refactor: add constructor for copying a SafeHandleEx

Author: BinToss

deadlock-dotnet-sdk/Domain/SafeHandleEx.cs

@@ -19,6 +19,9 @@ namespace deadlock_dotnet_sdk.Domain;
 /// </summary>
 public class SafeHandleEx : SafeHandleZeroOrMinusOneIsInvalid
 {
+    public SafeHandleEx(SafeHandleEx safeHandleEx) : this(safeHandleEx.SysHandleEx)
+    { }
+
     /// <summary>
     /// Initializes a new instance of the <c>SafeHandleEx</c> class from a <see cref="SYSTEM_HANDLE_TABLE_ENTRY_INFO_EX"/>, specifying whether the handle is to be reliably released.
     /// </summary>