feat: split out read config for easier testing

[chadsr]

• Plus more tests

[codecov]

Codecov Report

Attention: Patch coverage is 91.20000% with 11 lines in your changes are missing coverage. Please review.

Project coverage is 84.73%. Comparing base (426846c) to head (785cd51).
Report is 3 commits behind head on master.

❗ Current head 785cd51 differs from pull request most recent head 3f70cd0

Please upload reports for the commit 3f70cd0 to get more accurate results.

Files	Patch %	Lines
waybar_crypto.py	81.03%	11 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master      #80      +/-   ##
==========================================
- Coverage   86.27%   84.73%   -1.54%     
==========================================
  Files           2        2              
  Lines         255      321      +66     
==========================================
+ Hits          220      272      +52     
- Misses         35       49      +14     

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