Set default shells

Explicitly set default shells so that opening a new terminal will
automatically use the correct shell.

Change-Id: Ie82f3d8d3cbb478006722082dda7f24d0795873d
Reviewed-on: https://git.clicks.codes/c/Chimera/NixFiles/+/409
Tested-by: Samuel Shuert <coded@clicks.codes>
Reviewed-by: Skyler Grey <minion@clicks.codes>
1 file changed