Add distinct search parameter

[ja7ad]

Pull Request

Related issue

Fixes #542

What does this PR do?

• This PR accept distinct search parameter, Refer to docs for more information.

PR checklist

Please check if your PR fulfills the following requirements:

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

Thank you so much for contributing to Meilisearch!

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 86.80%. Comparing base (59cdcef) to head (3459ce4).
Report is 3 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #548      +/-   ##
==========================================
+ Coverage   86.78%   86.80%   +0.01%     
==========================================
  Files          11       11              
  Lines        1635     1637       +2     
==========================================
+ Hits         1419     1421       +2     
  Misses        117      117              
  Partials       99       99              

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[curquiza]

Thank you @ja7ad
bors merge

[meili-bors]

Build succeeded:

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