ENH: implemented xml file converter

src/caoscrawler/xml_converter.py

@@ -66,8 +66,8 @@ class XMLFileConverter(SimpleFileConverter):
                 raise ConverterValidationError(
                     "Error during the validation of the XML file:\n"
                     f"{element.path}\n" + err.message)
-        raise NotImplementedError("Not implemented yet")
-        # return [structure_element]
+
+        return XMLTagElement(xml.getroot())
 
 
 class XMLTagConverter(Converter):