feat: Add ahb_status field to DataElement class

[alex2702]

This PR adds the ahb_status field (currently part of the SegmentGroup, Segment, and Code classes) to the DataElement class and extends the AHB reader to fill in the field when creating DataElement instances.

[hf-kklein]

@alex2702 thanks for your contribution!

just ping me here, if you need any help with the PR. The tests in the CI run on the actual BDEW data which are loaded from a private submodule (we cannot publish them because they are from a paid BDEW subscription). Because you are not a member of the Hochfrequenz organization on Github, you cannot checkout this submodule, so some tests will probably fail on your localhost.

anyway: tox -e snapshots should work for the files that once were publicly available on the bdew website and are still checked in here: https://github.com/Hochfrequenz/xml-fundamend-python/blob/main/unittests/example_files/UTILTS_AHB_1.1d_Konsultationsfassung_2024_04_02.xml

[hf-kklein]

@alex2702 Your code was was actually just missing the snapshots. I updated them in cbcb614 and merged it :)

Thanks again. Your code is part of any version >=v0.10.0

[alex2702]

Thanks a lot for getting this merged and released so quickly @hf-kklein!