move options back out to their config files, improve documentation

modules/hosts/kitagawa/kitagawa.nix

@@ -14,7 +14,7 @@
     };
 
     components = {
-      bootLoader = "limine";
+      bootLoader.selection = "limine";
       displayManager = "ly";
       windowManagers = "niri";
       shells = "noctalia";
@@ -26,10 +26,7 @@
         stylix.enable = true;
       };
 
-      shells.zsh = {
-        enable = true;
-        antidote.enable = true;
-      };
+      shells.zsh.antidote.enable = true;
 
       applications = {
         gui = {