Also, Tokenize.hs added for future endpoint for tokenization

Now we don't keep custom corenlp stuff in our code and it's more
portable. Also, spacy is refactored to use its own types as well as
john snow nlp.

This commit adds a `panicTrace` function to be used as a drop-in
replacement of the `panic` function, with the difference that we
wrap the error in a `WithStacktrace` error, to be later caught
and logged.

This allows us to have only one single (static) map which will be
treated by GHC as a CAF.

We do that thanks to a new typeclass method for
the `MonadJobStatus` called `noJobHandle`.

This commit modifies the backend code to convert the input CSV into an
`NgramsList`, so that we can reuse the JSON API for the upload.

it also brings the CSV and JSON APIs closer in look.
Temporarily disable the `importCsvFile` function.