made stats functions consistent with BaseParser

[DHekstra]

In this PR,

1. Made all four rs.cc functions compatible with the BaseParser (see also https://github.com/rs-station/careless/blob/main/careless/stats/parser.py), itself taken from careless.stats without modification. This provides the user with a uniform interface and makes it easier to integrate the functions in code that just saves the results as CSV files and figure files by virtue of the -i, -o, and '-s` flags introduced by the BaseParser. I did not modify any calculations.

2. Changed datatypes from MTZInt to int32 in the results DataFrame as introduced by Kevin in the careless.stats functions. This locally addresses the issue seaborn 0.12.x breaks plotting functionality #36

3. In sns.lineplot calls I replaced the ci keyword with errorbar

4. Made the analyze_...() functions compatible with both MTZ path and rs.DataSet input to facilitate use as function calls within notebooks. I do so using the following:

    if type(mtzpath) is rs.dataset.DataSet:
        mtz=mtzpath
    else:
        mtz = rs.read_mtz(mtzpath)

5. I have tested each function on Careless output.

[DHekstra]

OK, let me look into the "Test Documentation" error first

[DHekstra]

For my records: I have tested these changes in /n/holyscratch01/hekstra_lab/dhekstra/careless-examples/e35 (rs.cchalf, rs.ccpred, rs.ccsym) and tested rs.ccanom on ~/HEWL/hewl_xval_0.mtz.

[dennisbrookner]

The failing test build of the docs is related to this:
sphinx-contrib/autoprogram#55

Briefly, in order for the docs to build properly, argparse usage must look like this:

def parse_arguments():
    parser = argparse.ArgumentParser()
    # blah blah blah
    return parser

def main():
    parser = parse_arguments()
    args = parser.parse_args()

and NOT like this:

def parse_arguments():
    parser = argparse.ArgumentParser()
    # blah blah blah
    return parser.parse_args()

def main():
    args = parse_arguments()

nor any other equally valid paradigm

[dennisbrookner]

To further clarify the situation with the docs - this is the relevant code from https://github.com/rs-station/rs-booster/blob/main/docs/CC_plots.rst that auto-builds stuff:

.. autoprogram:: rsbooster.stats.ccsym:parse_arguments()
   :prog: rs.ccsym

.. autoprogram:: rsbooster.stats.ccanom:parse_arguments()
   :prog: rs.ccanom

.. autoprogram:: rsbooster.stats.cchalf:parse_arguments()
   :prog: rs.cchalf

.. autoprogram:: rsbooster.stats.ccpred:parse_arguments()
   :prog: rs.ccpred

So as written, autoprogram is expecting each of these files to contain a function parse_arguments() that returns some sort of ArgumentParser object.

I think that this structure is compatible with the BaseArguments system that is being adopted in this PR. Let me know if that isn't the case, and we can reconsider the best options.

[dennisbrookner]

This all looks good to me!