feat: #670 get_podcast get_episode thumbnails

[sigma67]

closes #670

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.07%. Comparing base (b86654f) to head (b40fefb).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #695   +/-   ##
=======================================
  Coverage   95.07%   95.07%           
=======================================
  Files          40       40           
  Lines        2357     2357           
=======================================
  Hits         2241     2241           
  Misses        116      116           

Flag	Coverage Δ
unittests	95.07% <ø> (ø)

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