Add a few "See also" entries to typemax and friends

[christiangnrd]

I would find it helpful to find the names of the related float max functions from another's docstring.

I kept maxintfloat in the floatmin and typemin docstrings since there is no minintfloat and I still think it would be helpful to have it there. I also fixed and example in the typemin docstring to be consistent with the typemax example.

[jishnub]

Thanks, looks good to me