Narrative content API support

[talha-ahsan]

note:

card images now surface to
"#{url_prefix}/large/#{id}#{face_suffix}-narrative.jpg"
which we'll need to upload images to as well.

Narrative Text API support as an attribute accessible via Printings and Cards.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.42%. Comparing base (28c9898) to head (2e1fba5).
Report is 22 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #396   +/-   ##
=======================================
  Coverage   98.42%   98.42%           
=======================================
  Files          76       76           
  Lines        1332     1334    +2     
  Branches      178      178           
=======================================
+ Hits         1311     1313    +2     
  Misses         21       21           

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