BasicPSFPhotometry does not have an ``init_guesses`` keyword

[astrofrog]

The documentation at:

https://photutils.readthedocs.io/en/stable/api/photutils.psf.BasicPSFPhotometry.html#photutils.psf.BasicPSFPhotometry

refers to init_guesses but it doesn't seem to be a valid keyword argument.

If this was removed, what is now the proper way to provide the list of positions if these have already been determined beforehand?

[astrofrog]

My bad it's an argument to do_photometry and __call__ - however I think in the docstring when this is mentioned:

If finder is None, initial guesses for positions of objects must be provided

it would be good to specify how. Also later when it's mentioned that init_guesses is an argument to do_photometry, it would be good to specify __call__ as well?

[astrofrog]

On a related note, the intersphinx link is broken for init_guesses:

[astrofrog]

On a somewhat related note, it would be good if init_guesses could be smart about the names for the x/y columns (in a similar vein to https://github.com/astropy/photutils/issues/966). It's difficult to have to always make new tables with different names :-/