Is there an existing feature request for this?

• I have searched the existing issues

Describe what you would like added or changed

Forestry's community rewrite recently got ported to 1.20, and it'd be great to have Railcraft's backpacks (the Trackman and Iceman's backpacks) make a return.

I'm pretty sure they existed without Forestry installed, but even if they only show up when Forestry CE is installed it'd be great.