Add methods to automatically add/update documents in batches

[curquiza]

We need methods to add and update the documents of MeiliSearch in batch instead of letting the users call addDocuments in a loop.

• Add addDocumentsInBatches

addDocumentsInBatches(documents, batchSize = 1000, primaryKey = nil)

batchSize and primaryKey are optional parameters

• Add updateDocumentsInBatches

updateDocumentsInBatches(documents, batchSize = 1000, primaryKey = nil)

batchSize and primaryKey are optional parameters

• Add tests

Example: meilisearch/meilisearch-python#260

⚠️ This issue is generated, it means addDocumentsInBatches andd updateDocumentsInBatches might be named differently in this package. Keep the already existing way of naming in this package to stay idiomatic with the language and the repository.
Also, if you are a maintainer, feel free to add any clarification and instruction about this issue related to the specific languages of the repo.

Related to meilisearch/integration-guides#106

Sorry if this is already partially/completely implemented, feel free to let me know about the state of this issue in the repo.

[vishnugt]

There are already methods present to index multiple documents in a single call, but the batch option is missing.
Can I take this up?

[bidoubiwa]

Hey @vishnugt thanks so much for giving interest in this repo! 😊.

We prefer not assigning people to our issues because sometimes people ask to be assigned and never come back, which discourages the real volunteers contributors to open a PR to fix this issue.
We will accept and merge the first PR that fixes correctly and well implements the issue following our contributing guidelines.

[vishnugt]

Fair enough, I have created a PR #1039 for this, please have a look at your convenience