implement named parameterized queries

[WolfgangFahl]

trafficstars

see e.g. https://github.com/WolfgangFahl/pyLoDStorage/blob/master/lodstorage/params.py

which does jinja compatible parameter handling and is used in https://github.com/WolfgangFahl/snapquery

with demos at https://snapquery.bitplan.com/ and https://genwiki2024.bitplan.com/