feat: add apple kanata layout

nix/hosts/kumatani/configuration.nix

@@ -46,6 +46,7 @@
 
   desktop.enable = true;
   kanata.enable = true;
+  kanata.apple = true;
   users.users.luca = {
     isNormalUser = true;
     extraGroups = [ "wheel" ]; # Enable ‘sudo’ for the user.

nix/modules/kanata.nix

@@ -7,11 +7,15 @@
 {
   options.kanata = {
     enable = lib.mkEnableOption "enable kanata";
+    apple = lib.mkEnableOption "enable apple";
   };
 
   config = lib.mkIf config.kanata.enable {
     services.kanata.enable = true;
-    services.kanata.keyboards.main = {
+    services.kanata.keyboards =
+      if !config.kanata.apple then
+        {
+          main = {
             config = ''
               (defsrc
                 caps
@@ -27,5 +31,30 @@
             '';
             extraDefCfg = "process-unmapped-keys yes";
           };
+        }
+      else
+        {
+          main = {
+            config = ''
+              (defsrc
+                caps
+                lalt
+                lmet
+              )
+
+              (defalias
+                caps-mod esc
+                alt-mod lmet
+                met-mod lalt
+              )
+
+              (deflayer base
+                @caps-mod
+                @alt-mod
+                @met-mod
+              )
+            '';
+          };
+        };
   };
 }