make spartan generic over the evaluation engine

update version

disable Wasm CI check

* add the MinRoot VDF example

* optimize a bit

* optimization and cleanup

* clippy

* add examples to CI

* use inbuilt pow_vartime

* use pasta_msm crate for MSM

* add repr-c to pasta_curves

* add +stable

* update pasta-msm version

* recursion attempt

* address clippy

* initialize the running instance and witness of the primary correctly

* add asserts for debugging

* fix a bug in AllocatedPoint

* add debug statements

* fix an issue with how we inputize hashes; remove debug statements

* rename

* cleanup

* speedup tests

* require step_circuit implementors to provide a way to execute step computation

* fix build

* switch to stable