Add support for NDJSON file format

[gabriel-vasile]

1. Specify the MIME type and extension for which to add
   MIME type: application/x-ndjson
   extension: .ndjson
2. Share an example file

 {"some":"thing"}
 {"foo":17,"bar":false,"quux":true}
 {"may":{"include":"nested","objects":["and","arrays"]}}

3. Optionally, add a reference to the specification of the file format.
   https://github.com/ndjson/ndjson-spec

[divyanshgaba]

Hi!
I would like to help with this one.
This is will be my very first contribution to an open-source project, hoping you could guide me if needed.
After going through the ndjson-spec, I suggest the following,

1. Split the in bytes by \r\n and then each split by \n
2. Split is valid if it does not contain \r and forms a valid JSON or is empty.
3. If any split is invalid, return false. Otherwise, return true.

[gabriel-vasile]

Hi @divyanshgaba !
The algorithm seems good with one addition:

When detecting a file, the library limits itself to reading only the first 2048 bytes from the input. Because of this, it might happen that the last split is missing some data to be valid JSON. In this case we should return true.
This is similar to JSON detection: The input is scanned. If there is no error, or the error happens at the 2048th byte then we consider this is a JSON file that might have been cut at 2048 bytes. Else, if the error happened before reaching the ReadLimit, return false.

[divyanshgaba]

Understood! Should i start working on this?

[gabriel-vasile]

Yeah, sure!

[divyanshgaba]

I have raised a pull request #41, Kindly review.