shell replacements: Remove total dependency on bat

Previously, everything was predicated on bat being enabled. This was
clearly an error, so I've changed it so the replacements are instead
predicated on their own individual options as was originally intended

Change-Id: Ia3464a558efd85d73f6b6659dd72bb6266b2d6ec
Reviewed-on: https://git.clicks.codes/c/Chimera/NixFiles/+/439
Reviewed-by: Samuel Shuert <coded@clicks.codes>
Tested-by: Skyler Grey <minion@clicks.codes>
1 file changed