Set up Spotless + Ktlint

[Goooler]

Addressed from #19.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 96.66%. Comparing base (87a8faf) to head (21da105).

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #26   +/-   ##
=======================================
  Coverage   96.66%   96.66%           
=======================================
  Files           3        3           
  Lines          90       90           
  Branches       26       26           
=======================================
  Hits           87       87           
  Partials        3        3           

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.