Disable unsafe Forked copy

rt/include/typon/forked.hpp

@@ -54,6 +54,9 @@ namespace typon
       }
     }
 
+    Forked(const Forked &) = delete;
+    Forked& operator=(const Forked &) = delete;
+
     Forked& operator=(Forked && other)
       noexcept(std::is_nothrow_move_constructible_v<T>)
     {
@@ -128,6 +131,9 @@ namespace typon
       }
     }
 
+    Forked(const Forked &) = delete;
+    Forked& operator=(const Forked &) = delete;
+
     Forked(Forked && other) noexcept(std::is_nothrow_move_constructible_v<T>)
     {
       _result = other._result;