[BUG] ccd_calib should check case of CCD or CMOS camera types

**Describe the bug**
`ccd_calib` doesn't work if CCD is input as "CCD", rather it expects "ccd". There is no need for this to be case sensitive. The function should be changed to allow for any case of CCD, ccd, Ccd, etc. and the same for CMOS.

https://github.com/macro-consortium/pyscope/blob/fdc89a0c272dca2e765a266b2b5a8b29257998fb/pyscope/reduction/ccd_calib.py#L91C1-L91C23
