Add documentation

[5yutan5]

No description provided.

[codecov]

Codecov Report

Merging #44 (5a43742) into main (481ee03) will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##              main       #44   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           18        18           
  Lines          573       574    +1     
=========================================
+ Hits           573       574    +1     

Impacted Files	Coverage Δ
qdarktheme/dist/dark/rc_icons.py	100.00% <ø> (ø)
qdarktheme/dist/light/rc_icons.py	100.00% <ø> (ø)
qdarktheme/__init__.py	100.00% <100.00%> (ø)
qdarktheme/base.py	100.00% <100.00%> (ø)
qdarktheme/util.py	100.00% <100.00%> (ø)
tests/test_util.py	100.00% <100.00%> (ø)

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