Use SQLite for parts database

The intent here is to use this with
https://github.com/phiresky/sql.js-httpvfs. There are major missing
pieces:

- the python sqlite on my system doesn't have the fts5 extension
availible, so while sql.js-httpvfs theoretically supports full-text
search, it is not availible
- the sql.js-httpvfs VFS needs to be modified to download the index
file and map between the index & the gzipped data, and use the
Compression Streams API to decompress each chunk
- no work was done on the frontend portion of jlcparts