minion@greylag: Add stgit

stgit is an editor for stacked commits. I'm trialing it for use as I
believe it may be a significantly more gerrit-like workflow, which is a
benefit on both gerrit and github-likes (gerrit because the model on my
computer will better match what is on the server, github-likes because
it will allow me to apply a workflow I prefer to them)

Change-Id: Idd5fbb794b2991f444e21862ed13a483b4f7c8dd
Reviewed-on: https://git.clicks.codes/c/Chimera/NixFiles/+/385
Tested-by: Skyler Grey <minion@clicks.codes>
Reviewed-by: Skyler Grey <minion@clicks.codes>
diff --git a/homes/x86_64-linux/minion@greylag/default.nix b/homes/x86_64-linux/minion@greylag/default.nix
index c94cebc..6eba155 100644
--- a/homes/x86_64-linux/minion@greylag/default.nix
+++ b/homes/x86_64-linux/minion@greylag/default.nix
@@ -23,6 +23,8 @@
     greylag
   '';
 
+  home.packages = [ pkgs.stgit ];
+
   chimera = {
     wallpaper = ./wallpaper.png;