Add EditorConfig

[lucacome]

Proposed changes

Problem: Every editor has different defaults.

Solution: Use EditorConfig to define coding styles

Closes #1739

Checklist

Before creating a PR, run through this checklist and mark each as complete.

• I have read the CONTRIBUTING doc
• I have added tests that prove my fix is effective or that my feature works
• I have checked that all unit tests pass after adding my changes
• I have updated necessary documentation
• I have rebased my branch onto main
• I will ensure my PR is targeting the main branch and pulling from my branch from my own fork

Release notes

If this PR introduces a change that affects users and needs to be mentioned in the release notes,
please add a brief note that summarizes the change.

NONE

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 86.20%. Comparing base (69522ee) to head (9114f09).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1849   +/-   ##
=======================================
  Coverage   86.20%   86.20%           
=======================================
  Files          83       83           
  Lines        5540     5540           
  Branches       52       52           
=======================================
  Hits         4776     4776           
  Misses        715      715           
  Partials       49       49           

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