Integrate warning in the task status

[curquiza]

It might be interesting for some users, regarding some situations to add a warning in the task status. This warning will not prevent the task from succeeding, but could inform the users.

Ex:

• when cutting the document because too many words are present in the field (65 635 in v0.24.0 and later): Increase limit: number of positions (~ words) per attribute meilisearch#1770 (comment)

[gmourier]

Thanks, @curquiza, this is interesting feedback! I think we could go further and define other information of this type that could be useful. The details field of a task object could be well suited to this type of information as well.

We could also put them in stdout with a dedicated format.