New crate release

[huitseeker]

The repo has recently landed awesome PRs such as #83, as well as PRs such as #85 and #88 that change core data formats. Once #95 lands, it would be great to have a new release of the halo2curves crate, for consumption in projects such as Nova.

[mratsim]

Note, for #95, at the current state it will be exposing jacobi, legendre and the Legendre trait.

I don't think I've heard any direction regarding where to go with the API

1. AFAIK it was because exponentiation by (p-1)/2 needed to abstract away the usage of curve-specific modulus constants.
   In that case, the trait can be deleted, it should be recent enough that breakage is minimal if any (cc @huitseeker).
2. Alternatively, the legendre procedure can call jacobi instead and the Legendre trait can be preserved. Though I'm curious what's the use-case of a trait instead of a function in that case.

I'm personally in-favor of removing the Legendre trait.

Another change of note is #86, we need to remove the MSM/FFT impl from halo2 repo when upgrading it to avoid ambiguous calls.

[CPerezz]

Would be nice to have some sort of solution for zkcrypto/group#48 prior to releasing. But we can release a patch on the meantime if needed.

Agree then we need to address the comments of @mratsim.

[mratsim]

closed by #114