Add mostly final ags config

hosts/totsugeki/home-manager/desktop/ags/config/services/gpu.js

@@ -0,0 +1,43 @@
+class GPUService extends Service {
+  static {
+    Service.register(
+      this,
+      {},
+      { "current-usage": ["float", "r"], temperature: ["float", "r"] },
+    );
+  }
+
+  #currentUsage = 0;
+  #temperature = 0;
+
+  get current_usage() {
+    return this.#currentUsage;
+  }
+
+  get temperature() {
+    return this.#temperature;
+  }
+
+  constructor() {
+    super();
+    this.#update();
+    const interval = setInterval(() => {
+      this.#update();
+    }, 2000);
+  }
+
+  #update() {
+    this.#currentUsage = Utils.exec(
+      "sh -c 'cat /sys/class/drm/card?/device/gpu_busy_percent'",
+    );
+    this.#temperature =
+      Utils.exec(
+        "sh -c 'cat /sys/class/drm/card?/device/hwmon/hwmon?/temp1_input'",
+      ) / 1000;
+    this.changed("current-usage");
+    this.changed("temperature");
+  }
+}
+
+const gpu = new GPUService();
+export default gpu;