MAINT: Set default coding style via EditorConfig

[Zeroto521]

• closes #xxxx
• whatsnew entry

as title

[codecov]

Codecov Report

Merging #600 (53ce91b) into main (6291fd4) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #600   +/-   ##
=======================================
  Coverage   99.58%   99.58%           
=======================================
  Files          82       82           
  Lines         969      969           
  Branches      102      102           
=======================================
  Hits          965      965           
  Misses          1        1           
  Partials        3        3           

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