Suggestion: Guidance on Choosing Classical Method

[onzerem]

@dlfivefifty Hi, I was looking through the documentation, and I was thinking it may be useful to add a little more on when each classical polynomial would be useful depending on the problem. For example, ultraspherical polynomials are useful for higher dimensions. I'd be happy to add this in a PR myself. Please let me know if you think that's a good idea or not. Thank you!

[dlfivefifty]

Cool that would be great!

[onzerem]

Awesome thank you, just submitted the PR!