feat(App): update Finlytic Flutter app UI and blocs

FinlyticApp/lib/features/calendar/bloc/calendar_event.dart

@@ -0,0 +1,37 @@
+import 'package:equatable/equatable.dart';
+
+abstract class CalendarEvent extends Equatable {
+  const CalendarEvent();
+
+  @override
+  List<Object?> get props => [];
+}
+
+class FetchCalendarEvents extends CalendarEvent {}
+
+class FilterCategoryChanged extends CalendarEvent {
+  final String category;
+
+  const FilterCategoryChanged(this.category);
+
+  @override
+  List<Object?> get props => [category];
+}
+
+class FilterDateSelected extends CalendarEvent {
+  final DateTime? date;
+
+  const FilterDateSelected(this.date);
+
+  @override
+  List<Object?> get props => [date];
+}
+
+class MonthChanged extends CalendarEvent {
+  final DateTime newMonth;
+
+  const MonthChanged(this.newMonth);
+
+  @override
+  List<Object?> get props => [newMonth];
+}