添加 ButtonHA 类及其服务功能，更新相关测试用例以支持新功能

test/button.ts

@@ -0,0 +1,9 @@
+import { button, showMore } from "./common.ts";
+
+const buttons = await button.getServiceEntities();
+
+// console.log(showMore(buttons));
+
+const tv = buttons.filter(b => b.attributes?.friendly_name?.includes('电视控制'));
+
+console.log(showMore(tv));