BasLee

> @BasLee CNA long format validator merged, please feel free to rebase this pr. Rebased and fixed some validation issues, most (relevant?) checks seem to run now

After some discussion with @pvannierop: The new `DISCRETE_LONG` format should probably not be passed to the front end, because the old 'wide' and the new 'long' CNA format should both...

Same problem here when I try to create a Document index with version `0.7.31`. When importing like `import {Document} from 'flexsearch'` the provided typings point to: ``` interface Document {...