Shared features from polysat branch (#6567)

* Allow setting default debug action

* Fix dlist and add iterator

* Add var_queue iterator

* Add some helpers

* rational: machine_div2k and pseudo_inverse

* Basic support for non-copyable types in map

* tbv helpers

* pdd updates

* Remove duplicate functions

gcc doesn't like having both versions

src/util/debug.h

@@ -19,10 +19,22 @@ Revision History:
 #pragma once
 
 #include <stdlib.h>
+#include <iostream>
 
 void enable_assertions(bool f);
 bool assertions_enabled();
 
+enum class debug_action {
+    ask,
+    cont,
+    abort,
+    stop,
+    throw_exception,
+    invoke_debugger,
+};
+debug_action get_default_debug_action();
+void set_default_debug_action(debug_action a);
+
 #include "util/error_codes.h"
 #include "util/warning.h"