test: cli

[KRiedmiller]

Show help message if no arguments are supplied. Test CLI

[codecov]

Codecov Report

❌ Patch coverage is 92.30769% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 89.77%. Comparing base (3de2117) to head (181b298).
⚠️ Report is 7 commits behind head on main.

Files with missing lines	Patch %	Lines
panseg/run_panseg.py	77.77%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #569      +/-   ##
==========================================
- Coverage   89.93%   89.77%   -0.17%     
==========================================
  Files         105      106       +1     
  Lines       10990    11003      +13     
==========================================
- Hits         9884     9878       -6     
- Misses       1106     1125      +19     

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