[ADD] report_carbone, jsonifier, export_json : carbone is an alternative to Py3o

jsonifier/exceptions.py

@@ -0,0 +1,7 @@
+# Copyright 2022 Camptocamp SA (http://www.camptocamp.com)
+# Simone Orsi <simahawk@gmail.com>
+# License LGPL-3.0 or later (http://www.gnu.org/licenses/lgpl.html).
+
+
+class SwallableException(Exception):
+    """An exception that can be safely skipped."""