Add object for model and core module

core/lib/domain/extensions/datetime_extension.dart

@@ -0,0 +1,18 @@
+
+extension DateTimeExtension on DateTime {
+
+  bool isToday() {
+    final now = DateTime.now();
+    return now.day == this.day && now.month == this.month && now.year == this.year;
+  }
+
+  bool isYesterday() {
+    final yesterday = DateTime.now().subtract(Duration(days: 1));
+    return yesterday.day == this.day && yesterday.month == this.month && yesterday.year == this.year;
+  }
+
+  bool isThisYear() {
+    final now = DateTime.now();
+    return now.year == this.year;
+  }
+}