[v1.3] Sort facets value by alphanumerical or count order

[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, please add any clarification and instructions about this issue.

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

Related to meilisearch/integration-guides#280

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New implementation

Related to:

• issue: Sort facets value by alphanumerical or count order meilisearch/meilisearch#3612
• discussion: Retrieve facet values sorted by the number of corresponding documents meilisearch/product#519 (comment)
• spec: Faceting Setting API - sortFacetValuesBy  meilisearch/specifications#247

Adds the ability to sort facets by their value which could be by using alpha or count.

Ensure the SDKs can handle the new index faceting configuration attribute sortFacetValuesBy. This enum could only take count or alpha.

The faceting configuration now have two attributes:

maxValuesPerFacet: integer
sortFacetValuesBy: object 
  index_name: alpha|count
  *: alpha|count // when should be applied to all indexes

TODO:

• Add the ability receive a new param in the updateFaceting settings method called sortFacetValuesBy.
• Add integration tests