feat:添加邮箱功能的接口类

src/main/java/com/njuzr/eaibackend/service/EmailService.java

@@ -0,0 +1,15 @@
+package com.njuzr.eaibackend.service;
+
+public interface EmailService {
+
+    void sendRegisterVerifyCode(String officialEmail);
+
+    void sendLoginVerifyCode(String officialEmail);
+
+    void sendPasswordChangeVerifyCode(String officialEmail);
+
+    void sendInitialPasswordEmail(String to, String username, String password);
+
+    void sendResetPasswordEmail(String to, String username, String password);
+
+}