Allow CompactAxis in check_axis

[ways]

As far as I understand https://docs.ogc.org/cs/21-069r2/21-069r2.html#_d5c16418-1a20-4dbf-bf7a-8e685062df97 both ValueAxis and CompactAxis should be allowed. The function check_axis currently only allow one of them. This pull request expands to allow both.

[lukas-phaf]

Good point!

This wasn't handled because the "Compact" expression is not very compact in this case, so we never use it. But it is indeed allowed.

I added two comments. Can you also make the same change for this case?
# Check for single value of allowed axes

It would be great if you could also add a unit test. A copy of the existing spec-domain-point.json test that uses the compact form would work fine. It would test both the "required" and "allowed" case.

[ways]

Test case added.

[codecov-commenter]

Codecov Report

Attention: 2 lines in your changes are missing coverage. Please review.

Comparison is base (e74abaa) 94.54% compared to head (e38ea22) 93.90%.

Files	Patch %	Lines
src/covjson_pydantic/domain.py	66.66%	2 Missing ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##           master       #9      +/-   ##
==========================================
- Coverage   94.54%   93.90%   -0.64%     
==========================================
  Files           9        9              
  Lines         275      279       +4     
==========================================
+ Hits          260      262       +2     
- Misses         15       17       +2     

Flag	Coverage Δ
unittests	93.90% <66.66%> (-0.64%)	⬇️

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[lukas-phaf]

Thanks for your contribution!