feat:增加提醒事项

lib/provider/reminder_provider.dart

@@ -0,0 +1,18 @@
+import 'package:flisp_app/models/reminder.dart';
+import 'package:flutter/material.dart';
+
+class ReminderProvider with ChangeNotifier {
+  late Reminder _formItem;
+
+  Reminder get formItem => _formItem;
+
+  void resetForm() {
+    _formItem = Reminder.getEmpty();
+    notifyListeners();
+  }
+
+  void initForm(Reminder reminder) {
+    _formItem = reminder;
+    notifyListeners();
+  }
+}