add CAMEO pyaeroval base config

[jgriesfeller]

Change Summary

The subject says it all

Related issue number

fix #1330

Checklist

• Start with a draft-PR
• The PR title is a good summary of the changes
• PR is set to AeroTools and a tentative milestone
• Documentation reflects the changes where applicable
• Tests for the changes exist where applicable
• Tests pass locally
• Tests pass on CI
• At least 1 reviewer is selected
• Make PR ready to review

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 63 lines in your changes missing coverage. Please review.

Project coverage is 78.60%. Comparing base (af3a797) to head (1b4f4ce).
Report is 1 commits behind head on main-dev.

Files with missing lines	Patch %	Lines
pyaerocom/aeroval/config/cameo/base_config.py	0.00%	63 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##           main-dev    #1331      +/-   ##
============================================
- Coverage     78.84%   78.60%   -0.24%     
============================================
  Files           136      137       +1     
  Lines         20790    20853      +63     
============================================
  Hits          16392    16392              
- Misses         4398     4461      +63     

Flag	Coverage Δ
unittests	78.60% <0.00%> (-0.24%)	⬇️

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