Feat support proximityPrecision setting

[Ja7ad]

Pull Request

Related issue

Fixes #507

What does this PR do?

• This PR support proximityPrecision setting

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

Attention: Patch coverage is 86.04651% with 6 lines in your changes missing coverage. Please review.

Project coverage is 86.73%. Comparing base (db30204) to head (ab899b2).
Report is 2 commits behind head on main.

Files	Patch %	Lines
index_settings.go	86.04%	3 Missing and 3 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #564      +/-   ##
==========================================
- Coverage   86.75%   86.73%   -0.02%     
==========================================
  Files          11       11              
  Lines        2000     2043      +43     
==========================================
+ Hits         1735     1772      +37     
- Misses        162      165       +3     
- Partials      103      106       +3     

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[curquiza]

bors merge

[meili-bors]

Build succeeded:

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