Replace SNIP implementation with broad integration of `pybaselines`

[gchure]

I've developed hplc-py using only one baseline estimation algorithm (SNIP), but there are many options that can be used. These are nicely tested and developed in the pybaselines package. A development goal of hplc-py would be to deprecate the correct_baseline method of a Chromatogram with a call to the broad pybaselines API.