move options back out to their config files, improve documentation

modules/hosts/takamaki/takamaki.nix

@@ -35,10 +35,7 @@
     };
 
     features = {
-      shells.zsh = {
-        enable = true;
-        antidote.enable = true;
-      };
+      shells.zsh.antidote.enable = true;
 
       services = {
         easyeffects.enable = true;