Integration of corcua dataset library
Hi,

I wanted to notify you about my speech dataset handling tool [corcua](https://gitlab.com/Jaco-Assistant/corcua). The task it solves is loading datasets from different formats and converting them to any framework-customized format we can use for training STT networks. It was built with the goal of making the addition of new datasets as easy as possible. Currently it supports 34 datasets, many in German, but 12 of them are multilingual containing 3 or more languages.

NeMo's `.jsonl` format is already supported, so the integration should be very easy.

I hope this is interesting for your project.
Greetings
Daniel