Add rankingScoreThreshold search parameter

[Ja7ad]

Pull Request

Related issue

Fixes #539

What does this PR do?

• Add the search parameter rankingScoreThreshold introduced in Meilisearch v1.9.0

PR checklist

Please check if your PR fulfills the following requirements:

• [x] Does this PR fix an existing issue, or have you listed the changes applied in the PR description (and why they are needed)?
• [x] Have you read the contributing guidelines?
• [x] Have you made sure that the title is accurate and descriptive of the changes?

Thank you so much for contributing to Meilisearch!

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 86.78%. Comparing base (26be7c8) to head (142442f).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #544 +/- ## ========================================== + Coverage 86.77% 86.78% +0.01% ========================================== Files 11 11 Lines 1633 1635 +2 ========================================== + Hits 1417 1419 +2 Misses 117 117 Partials 99 99 ```

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[meili-bors[bot]]

Build succeeded:

• integration-tests (go current version)
• integration-tests (go latest version)
• linter