Re-add kanata

Re-map the Caps Lock key to Esc/Ctrl and re-add home row mods.

hosts/t480/configuration.nix

@@ -39,6 +39,12 @@ in
 
     (import ../../modules/mixins/git.nix { inherit git; })
 
+    (import ../../modules/mixins/kanata.nix {
+      devices = [
+        "/dev/input/event1"
+      ];
+    })
+
     ../../users/opdavies
 
     ./modules/cron.nix

modules/mixins/kanata.nix

@@ -0,0 +1,42 @@
+{ devices }:
+
+{
+  services.kanata = {
+    enable = true;
+
+    keyboards = {
+      default = {
+        inherit devices;
+
+        extraDefCfg = "process-unmapped-keys yes";
+
+        config = ''
+          (defsrc
+            caps a s d f j k l ;
+          )
+
+          (defvar
+            tap-time 150
+            hold-time 200
+          )
+
+          (defalias
+            escctrl (tap-hold 100 100 esc lctl)
+            a (tap-hold $tap-time $hold-time a lmet)
+            s (tap-hold $tap-time $hold-time s lalt)
+            d (tap-hold $tap-time $hold-time d lsft)
+            f (tap-hold $tap-time $hold-time f lctl)
+            j (tap-hold $tap-time $hold-time j rctl)
+            k (tap-hold $tap-time $hold-time k rsft)
+            l (tap-hold $tap-time $hold-time l ralt)
+            ; (tap-hold $tap-time $hold-time ; rmet)
+          )
+
+          (deflayer base
+            @escctrl @a @s @d @f @j @k @l @;
+          )
+        '';
+      };
+    };
+  };
+}