add: 周年纪念日

src/main/java/com/dota/nexus/entity/Anniversary.java

@@ -0,0 +1,14 @@
+package com.dota.nexus.entity;
+
+import lombok.Data;
+import lombok.EqualsAndHashCode;
+
+import java.time.LocalDate;
+
+@Data
+@EqualsAndHashCode(callSuper = true)
+public class Anniversary extends Entity{
+    private LocalDate date;
+
+    private  type;
+}