支持添加删除服务器信息，以在服务器状态页显示CPU、内存等

lib/data/provider/server.dart

@@ -0,0 +1,29 @@
+import 'package:toolbox/core/provider_base.dart';
+import 'package:toolbox/data/model/server_private_info.dart';
+import 'package:toolbox/data/store/server.dart';
+import 'package:toolbox/locator.dart';
+
+class ServerProvider extends BusyProvider {
+  late List<ServerPrivateInfo> _servers;
+
+  List<ServerPrivateInfo> get servers => _servers;
+
+  Future<void> loadData() async {
+    setBusyState(true);
+    _servers = locator<ServerStore>().fetch();
+    setBusyState(false);
+    notifyListeners();
+  }
+
+  void addServer(ServerPrivateInfo info) {
+    _servers.add(info);
+    locator<ServerStore>().put(info);
+    notifyListeners();
+  }
+
+  void delServer(ServerPrivateInfo info) {
+    _servers.remove(info);
+    locator<ServerStore>().delete(info);
+    notifyListeners();
+  }
+}