* 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