Add Fresnel integral

Hello guys, I notice there are [Fresnel integral](https://specialfunctions.juliamath.org/stable/functions_overview/#[Error-Functions,-Dawson%E2%80%99s-and-Fresnel-Integrals](https://dlmf.nist.gov/7)-1) related docs there, but I don't see any implementation about Fresnel integral or [auxiliary Fresnel integral](http://www.mymathlib.com/functions/fresnel_sin_cos_integrals.html), so I think this part is missing?

In MATLAB, we can use ```fresnels``` and ```fresnelc``` to compute the Fresnel integral, so I think it would be great to have that support in SpecialFunctions.jl

Besides, I notice there is an implementation out there: https://github.com/kiranshila/FresnelIntegrals.jl