Send documents as jsonlines

[irevoire]

Description
All the functions that create or update documents should send jsonlines instead of a JSON array.

Why
That's faster to process by meilisearch and consumes less memory.

How
Currently, the issue is that when we send a POST or PUT request in the SDK, it's automatically flagged as JSON.
We need to update our internal to support JSON for the settings and jsonlines for the documents.

[matthias-wright]

I would like to work on this, is this issue still current?
Can the meilisearch server already handle requests that send jsonlines?

[irevoire]

Hey @matthias-wright, yes thanks for your interest, this hasn't been implemented.
Meilisearch can handle jsonlines IF you set the good content-type and only on the POST and PUT route 👍

[postmeback]

If #417 was able to fix this, then please close it.