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

report_carbone/models/base/exceptions.py

@@ -0,0 +1,11 @@
+from odoo.exceptions import UserError
+
+
+class MissingApiKeyError(UserError):
+    """Missing Carbone API Keys error.
+
+    When you try to use Carbone API without correct key.
+    """
+
+    def __init__(self, message):
+        super().__init__(message)