[Bug]: AUX_CAL data files aren't included in a pip install

[scottstanie]

Checked for duplicates

Yes - I've already checked

Describe the bug

during testing, @gracebato noted that the aux_cal data files are not included if you do pip install git+https://github.com/opera-adt/s1-reader (which is a preview to what will happen if/when we put this on pypi).

What did you expect?

The aux cal fixing doesn't work without these data files when you install in this way.

(test39) staniewi:cslc-loading-time$ python -m pip install git+https://github.com/opera-adt/s1-reader.git
Collecting git+https://github.com/opera-adt/s1-reader.git
  Cloning https://github.com/opera-adt/s1-reader.git to /private/var/folders/hw/sj9hl8555s36n00t812twvcr0000gq/T/pip-req-build-fhe8kain
  Running command git clone --filter=blob:none --quiet https://github.com/opera-adt/s1-reader.git /private/var/folders/hw/sj9hl8555s36n00t812twvcr0000gq/T/pip-req-build-fhe8kain
...

Installing collected packages: zipp, importlib-resources, s1reader
Successfully installed importlib-resources-5.10.0 s1reader-0.1.2 zipp-3.10.0

(test39) staniewi:cslc-loading-time$ ls /Users/staniewi/miniconda3/envs/test39/lib/python3.9/site-packages/s1reader/data/
sentinel1_track_burst_id.txt

Reproducible steps

No response

Environment

No response

[scottstanie]

closed by #77