feat: set up 'tlp' for laptop mode on 'astyanax'

hosts/astyanax/default.nix

@@ -108,5 +108,20 @@ in
       enable = true;
       package = pkgs.plocate;
     };
+    tlp = {
+      enable = true;
+      settings = {
+        CPU_SCALING_GOVERNOR_ON_AC = "performance";
+        CPU_SCALING_GOVERNOR_ON_BAT = "powersave";
+
+        CPU_ENERGY_PERF_POLICY_ON_BAT = "power";
+        CPU_ENERGY_PERF_POLICY_ON_AC = "performance";
+
+        CPU_MIN_PERF_ON_AC = 0;
+        CPU_MAX_PERF_ON_AC = 100;
+        CPU_MIN_PERF_ON_BAT = 0;
+        CPU_MAX_PERF_ON_BAT = 20;
+      };
+    };
   };
 }