Add listing scripts

[kytta]

Closes #24

[codecov]

Codecov Report

Merging #29 (86cf0aa) into main (1246efb) will not change coverage.
The diff coverage is 100.00%.

❗ Current head 86cf0aa differs from pull request most recent head 4221ac8. Consider uploading reports for the commit 4221ac8 to get more accurate results

@@            Coverage Diff            @@
##              main       #29   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            2         2           
  Lines          102       154   +52     
  Branches        22        36   +14     
=========================================
+ Hits           102       154   +52     

Impacted Files	Coverage Δ
skyr.py	100.00% <100.00%> (ø)
tests/skyr_test.py	100.00% <100.00%> (ø)

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