Add Atuin as a replacement for bkd-i-search

This change adds a replacement option for bkd-i-search via atuin. It
also defaults to disabling the up arrow functionality of atuin as it
wouldn't be a drop in replacement.

Change-Id: Iedc9006ba4b80059e41de24b9be7e5177a815071
Reviewed-on: https://git.clicks.codes/c/Chimera/NixFiles/+/521
Reviewed-by: Skyler Grey <minion@clicks.codes>
Tested-by: Samuel Shuert <coded@clicks.codes>
1 file changed