Additional Point Source Capabilities and More

[smericks]

• Can use apparent or absolute magnitude in light components (don't think its backwards compatible, will need review/discussion)
• add csv_path option for train_model.py
• new data generation options(option to store caustic area, option to select for quads only, option to select for high magnification of point source images)
• allow for custom pixel grid kwargs
• new sampling distributions for lens center

[smericks]

pandas 2.0 no longer allows DataFrame.append method: https://stackoverflow.com/questions/75956209/dataframe-object-has-no-attribute-append

[smericks]

• kwargs_synthesis=None needs to be set when calling lenstronomy.LensModel.profile_list_base_import_class() (not backwards compatible w/ older lenstronomy versions)
• numpy typing (i.e. np.int, np.bool) is no longer supported

[smericks]

Closing this large PR to make separate PRs for each feature.