hosts | add auto-cpufreq, switch loki & smaug to use, formating

hosts/workstation/auto-cpufreq.nix

@@ -0,0 +1,30 @@
+{
+  pkgs,
+  inputs,
+  config,
+  lib,
+  ...
+}:
+with lib; let
+  cfg = config.roles.auto-cpufreq;
+in {
+  options.roles.auto-cpufreq = {enable = mkEnableOption "roles auto-cpufreq";};
+  config = mkIf cfg.enable {
+    services.auto-cpufreq = {
+      enable = true;
+      settings = {
+        battery = {
+          governor = "powersave";
+          turbo = "never";
+          enable_thresholds = true;
+          start_threshold = 50;
+          stop_threshold = 80;
+        };
+        charger = {
+          governor = "performance";
+          turbo = "auto";
+        };
+      };
+    };
+  };
+}