Export palette family variation

[pcln-james]

Exporting a new type for the possible palette shades:

[
  'lightest',
  'light',
  'tint',
  'base',
  'heading',
  'tone',
  'dark',
  'shade',
  'darkest',
]

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (056b7eb) 95.68% compared to head (e362df1) 95.68%.
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1422   +/-   ##
=======================================
  Coverage   95.68%   95.68%           
=======================================
  Files         203      203           
  Lines        2456     2456           
  Branches      476      476           
=======================================
  Hits         2350     2350           
  Misses         50       50           
  Partials       56       56           

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