It would help with review and reduce potential human error to autogenerate [how the C code decodes jets](https://github.com/BlockstreamResearch/simplicity/blob/7a6ba113dff8d77e65a5f35d2ac613e219633125/C/primitive/elements/primitive.c#L70).
It would help with review and reduce potential human error to autogenerate how the C code decodes jets.