default to .config/TerminalOne/config.js as the config path

[atinylittleshell]

addressing #32

default config path now becomes ~/.config/TerminalOne/config.js

for backward compatibility we will still use the previous config path if that exists. users who prefer the new default path can manually migrate

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (3435721) 61.61% compared to head (39e6aa5) 61.61%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #50   +/-   ##
=======================================
  Coverage   61.61%   61.61%           
=======================================
  Files           3        3           
  Lines          99       99           
  Branches       48       48           
=======================================
  Hits           61       61           
  Misses         33       33           
  Partials        5        5           

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