First implementation of questions management

src/parsers/BaseNodeParser.py

@@ -616,6 +616,10 @@ class UTN(HelperWithPos):
 
 
 class BaseNodeParser(BaseParser):
+    """
+    Parser that return LexerNode
+    """
+
     def __init__(self, name, priority, **kwargs):
         super().__init__(name, priority)
         if 'sheerka' in kwargs: