implement autotranslation for R

[scottdraves]

port from classic beaker to beakerx
https://github.com/twosigma/beaker-notebook-archive/blob/1.7.1/plugin/r/src/dist/beaker/R/beaker.r

[scottdraves]

see if this can be done well with the std irkernel.
if not we should look at porting our R kernel from classic Beaker.

[scottdraves]

I looked into this, and I think our best bet is to start by reviving our R kernel form classic Beaker first.
so this depends on #6023