refactor(nix/darwin): Swap ESC<->CapsLock with Kanata

nix/modules/darwin/kanata.nix

@@ -0,0 +1,25 @@
+{ user }:
+
+{ pkgs, ... }:
+
+{
+  launchd.user.agents.kanata = {
+    command = "/usr/bin/sudo ${pkgs.kanata}/bin/kanata -c ${../../../include/kanata.kbd} -n";
+    serviceConfig = {
+      UserName = user;
+      RunAtLoad = true;
+      KeepAlive = {
+        SuccessfulExit = false;
+        Crashed = true;
+      };
+      StandardErrorPath = "/Users/${user}/.logs/kanata.err.log";
+      StandardOutPath = "/Users/${user}/.logs/kanata.out.log";
+      ProcessType = "Interactive";
+      Nice = -30;
+    };
+  };
+
+  security.sudo.extraConfig = ''
+    ${user} ALL=(ALL) NOPASSWD: ${pkgs.kanata}/bin/kanata
+  '';
+}