Update/add extraction module for more generic CSV parsing

[zachsa]

Currently the batched line extraction has the potential to break CSV rows where such a row contains unescaped newline chars.

But this is allowed according to the the RFC 4180 specification. Either the current parser needs to ignore newline markers if they appear within a quoted field (CSV) or a different line extraction needs to be made available.

If CSVs are known NOT to contain newline markers, then the batch extraction as it currently exists can still be used for parsing CSVs via batches

[zachsa]

Also need to check that the current extraction does respect escaped newline chars