Update website config

[olivroy]

Prework

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• I have already submitted a discussion topic or issue to discuss my idea with the maintainer.

Related GitHub issues and pull requests

• Ref: #

Summary

The main purpose of this PR is to modernize the website look and to add a search bar. I also removed back-ticks and quotes from the contents as they are not required by pkgdown
The badges change make them appear on the side of the page

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (2df5c20) 100.00% compared to head (e0be9c0) 100.00%.

❗ Current head e0be9c0 differs from pull request most recent head d474033. Consider uploading reports for the commit d474033 to get more accurate results

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Additional details and impacted files

@@            Coverage Diff            @@
##              main      #151   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           28        28           
  Lines         1990      1990           
=========================================
  Hits          1990      1990           

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[wlandau]

Thanks, I like these improvements!

[olivroy]

Apologies for the failed build. here is a preview of the new look

[wlandau]

No worries, I fixed the _pkgdown.yaml in the PR.