Feature: Implement WCS header support

Assess which WCS header keywords are of relevance for this project. Add support to carrying through and modifying WCS information through the calibration, where applicable.

References

• https://ui.adsabs.harvard.edu/abs/2006SPD....37.0307T/abstract
• https://docs.astropy.org/en/latest/wcs/index.html
• https://zenodo.org/records/1188875#.XnpOtJNKjyI