Upgraded snowfall lib

modules/nixos/system/monitoring/default.nix

@@ -0,0 +1,27 @@
+{
+  options,
+  config,
+  pkgs,
+  lib,
+  ...
+}:
+with lib; let
+  cfg = config.aa.system.monitoring;
+in {
+  options.aa.system.monitoring = with types; {
+    enable = mkEnableOption "monitoring";
+  };
+
+  config = mkIf cfg.enable {
+    environment.systemPackages = with pkgs; [
+      htop
+      lm_sensors
+      powertop
+      zenith
+    ];
+
+    powerManagement.powertop.enable = true;
+
+    aa.apps.btop.enable = true;
+  };
+}