Add support for the new stats from numerical facets like min, max

[brunoocasali]

⚠️ This issue is generated, it means the examples and the namings do not necessarily correspond to the language of this repository.
Also, if you are a maintainer, feel free to add any clarification and instruction about this issue.

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

Related to meilisearch/integration-guides#251

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Related to:

• issue: Return stats for numerical facets like min, max meilisearch#3426
• spec: Search API — Add facetStats description specifications#224

Make sure the SDK has a proper way to access the new facetStats information.
And there is no need to add a new test use case for this feature. Only add a few assertions in the existing tests that use facets. If they exist, it will be enough.