Add format functions based on prettier

[kamilzyla]

Changes

Supersedes #594 (rebase and address review comments - cannot edit the PR as it comes from a fork).

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 6 lines in your changes missing coverage. Please review.

Project coverage is 20.04%. Comparing base (aad552a) to head (a5ee768).

❗ Current head a5ee768 differs from pull request most recent head 61278e9

Please upload reports for the commit 61278e9 to get more accurate results.

Files	Patch %	Lines
R/tools.R	0.00%	6 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #597      +/-   ##
==========================================
- Coverage   20.29%   20.04%   -0.26%     
==========================================
  Files           9        9              
  Lines         468      474       +6     
==========================================
  Hits           95       95              
- Misses        373      379       +6     

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