Add powerlevel checks

lib/models/configs/power_level_config.dart

@@ -0,0 +1,16 @@
+import "package:freezed_annotation/freezed_annotation.dart";
+import "package:nexus/models/requests/membership_action.dart";
+part "power_level_config.freezed.dart";
+part "power_level_config.g.dart";
+
+@freezed
+abstract class PowerLevelConfig with _$PowerLevelConfig {
+  const factory PowerLevelConfig({
+    @Default(false) bool isStateEvent,
+    required String eventType,
+    MembershipAction? action,
+  }) = _PowerLevelConfig;
+
+  factory PowerLevelConfig.fromJson(Map<String, Object?> json) =>
+      _$PowerLevelConfigFromJson(json);
+}