[Feature] Numbers and arbitrary precison

[davekeogh]

https://github.com/Ph0enixKM/Amber/blob/eedd6812c06885b8d1658c6b19246238bff7e489/src/translate/compute.rs#L51

I understand that bash cannot handle arbitrary precision numbers, but I think many users may prefer a low precision mode that does not generate pipelines like this.

There may also be an issue of bc not being installed on all systems.