style: move img/ directory into docs/static/img

[samber]

No description provided.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 94.24%. Comparing base (29dcc41) to head (30f8ddd).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #721   +/-   ##
=======================================
  Coverage   94.24%   94.24%           
=======================================
  Files          18       18           
  Lines        2780     2780           
=======================================
  Hits         2620     2620           
  Misses        146      146           
  Partials       14       14           

Flag	Coverage Δ
unittests	94.24% <ø> (ø)

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