Allow for env variables to be non-escaped

[WeetHet]

I'm trying to use $HOME in env, and have no idea how to make it expand to my actual home. Is there a way to do so now, and if not, can it be added?

[viperML]

@nrabulinski did the scaping code for env variables. I'm not a fan of letting users put arbitrary bash code either.

But you can always use extraWrapperFlags which is not escaped:

• https://viperml.github.io/wrapper-manager/docs/module/#wrappersnameextrawrapperflags

• wrapper-manager/modules/base.nix

  Lines 173 to 176 in e1584a2

  	wrapProgram \
  	$file \
  	${lib.escapeShellArgs allArgs} \
  	${config.extraWrapperFlags}