NDJSON/CSV methods to add and update documents

See original GitHub issue

⚠️ This issue is generated, it means the nameing might be done differently in this package (ex: add_documents_json instead of addDocumentsJson). Keep the already existing way of naming in this package to stay idiomatic with the language and this repository.

📣 We strongly recommend doing multiple PRs to solve all the points of this issue

MeiliSearch v0.23.0 introduces two changes:

new valid formats to push data files, additionally to the JSON format: CSV and NDJSON formats.
it enforces the Content-type header for every route requiring a payload (POST and PUT routes)

Here are the expected changes to completely close the issue:

Currently, the SDKs always send Content-Type: application/json to every request. Only the POST and PUT requests should send the Content-Type: application/json and not the DELETE and GET ones.
Add the following methods and 🔥 the associated tests 🔥 to ADD the documents. Depending on the format type (csv or ndjson) the SDK should send Content-Type: application/x-dnjson or Content-Type: text/csv)
- addDocumentsJson(string docs, string primaryKey)
- addDocumentsCsv(string docs, string primaryKey)
- addDocumentsCsvInBatches(string docs, int batchSize, string primaryKey)
- addDocumentsNdjson(string docs, string primaryKey)
- addDocumentsNdjsonInBatches(string docs, int batchSize, string primaryKey)
Add the following methods and 🔥 the associated tests 🔥 to UPDATE the documents. Depending on the format type (csv or ndjson) the SDK should send Content-Type: application/x-dnjson or Content-Type: text/csv)
- updateDocumentsJson(string docs, string primaryKey)
- updateDocumentsCsv(string docs, string primaryKey)
- updateDocumentsCsvInBatches(string docs, int batchSize, string primaryKey)
- updateDocumentsNdjson(string docs, string primaryKey)
- updateDocumentsNdjsonInBatches(string docs, int batchSize, string primaryKey)

docs are the documents sent as String primaryKey is the primary key of the index batchSize is the size of the batch. Example: you can send 2000 documents in raw String in docs and ask for a batchSize of 1000, so your documents will be sent to MeiliSearch in two batches.

Example of PRs: