Downloads a table with information about lawsuit's
classes, subjects or courts to help with download_cjpg(). You
can also browse some of these tables with browse_table().
cjpg_table(type, tj = "tjsp")
| type | Either  | 
|---|---|
| tj | TJ from which to get data (only works with TJSP for now) | 
A tibble with either 12 columns (if type is "classes"
or "subjects") or 3 columns (if type is "courts")