Add new Git alias

I use cherry-picks in one project and am to lazy to always wait for
auto completion.

home/programs/git.nix

@@ -28,6 +28,7 @@
 
     fap = "fetch --all --prune";
     rh = "reset --hard";
+    cp = "cherry-pick";
 
     lg = "log --graph --pretty=format:'%Cred%h%Creset %an: %s - %Creset %C(yellow)%d%Creset %Cgreen(%cr)%Creset' --abbrev-commit --date=relative";
   };