0029451: Information Message Alert to debug an algorithm or object functionality

- Added possibility to send stream information and transient object into Message_Messenger. Message_Printer will process it if needed.
- Add Message_PrinterToReport to send messenger information into Message_Report.
- Extended Message_Report to collect hierarchical alerts, to be able to collect some metrics during alerts processing.
- Added Message_AlertExtended to prepare hierarchical alerts with custom attributes. One attribute for one alert.
- Added Message_CompositeAlerts class to handle a container of alerts.
- Added Message_Level to start a new hierarchical level by creating an instance, stop by destricting.
- Added Message_Attribute and inheritors to store custom information about alert like object, stream, shape, some metrics.
- Implement Message_AttributeAlert to collect start/stop information about active metrics of Message_Report. This kind of attribute is created if at least one metric is active in the report.
- Add Message_MetricType enumeration with possible kinds of metrics in report.
- Implement DumpJson for Message_Report to store all collected alerts into stream.
- Added draw commands for Message_Report, Message_Messenger.

src/Message/Message_Alert.cxx

@@ -14,6 +14,7 @@
 // commercial license or contractual agreement.
 
 #include <Message_Alert.hxx>
+#include <Standard_Dump.hxx>
 
 IMPLEMENT_STANDARD_RTTIEXT(Message_Alert,Standard_Transient)
 
@@ -48,3 +49,12 @@ Standard_Boolean Message_Alert::Merge (const Handle(Message_Alert)& /*theTarget*
   // by default, merge trivially
   return Standard_True;
 }
+
+//=======================================================================
+//function : DumpJson
+//purpose  :
+//=======================================================================
+void Message_Alert::DumpJson (Standard_OStream& theOStream, Standard_Integer) const
+{
+  OCCT_DUMP_TRANSIENT_CLASS_BEGIN (theOStream)
+}