static datasets as loadable extensions

[asg017]

bundling static datasets (read-only CSVs) as loadable sqlite extensions, bundled as serialized databases.

Would really only be helpful for "helper" datasets, like cpi, or US state abbreviations/capitols etc.

• cpi
• state abbrevations
• top N cities, lat lon, population, etc
• state abbreviations to full names, FIPs, other codes
• https://github.com/unitedstates/congress