Batches typing issues

[mdubus]

Description
When working with batches, I encountered some issues with typing:

• Batch type is not exported from meilisearch. It has to be imported from meilisearch/src/batch
• batchUids doesn't exist in the TasksQuery type (but the query with it works perfectly fine, having me think it was forgotten)

Expected behavior
We should be able to import the Batch type from meilisearch directly.
Using the batchUids as a parameter shouldn't throw a typescript error.

Screenshots or Logs

[flevi29]

#1825 fixes this issue.