feat: Add notes

lib/core/bloc/base_state.dart

@@ -0,0 +1,25 @@
+import 'package:paperless_mobile/core/bloc/loading_status.dart';
+
+class BaseState<T> {
+  final Object? error;
+  final T? value;
+  final LoadingStatus status;
+
+  BaseState({
+    required this.error,
+    required this.value,
+    required this.status,
+  });
+
+  BaseState<T> copyWith({
+    Object? error,
+    T? value,
+    LoadingStatus? status,
+  }) {
+    return BaseState(
+      error: error ?? this.error,
+      value: value ?? this.value,
+      status: status ?? this.status,
+    );
+  }
+}