static datasets as loadable extensions

bundling static datasets (read-only CSVs) as loadable sqlite extensions, bundled as [serialized databases](https://www.sqlite.org/c3ref/deserialize.html). Would really only be helpful for "helper" datasets, like [cpi](https://github.com/palewire/cpi), or [US state abbreviations](https://www.faa.gov/air_traffic/publications/atpubs/cnt_html/appendix_a.html)/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