新增：新增修改邮箱功能，并优化部分以往代码（引入 spring-boot-starter-mail 用于发送邮件验证码）

continew-admin-ui/src/api/common/captcha.ts

@@ -0,0 +1,22 @@
+import axios from 'axios';
+import qs from 'query-string';
+
+export interface ImageCaptchaRes {
+  uuid: string;
+  img: string;
+}
+export function getImageCaptcha() {
+  return axios.get<ImageCaptchaRes>('/common/captcha/img');
+}
+
+export interface MailCaptchaReq {
+  email: string;
+}
+export function getMailCaptcha(params: MailCaptchaReq) {
+  return axios.get('/common/captcha/mail', {
+    params,
+    paramsSerializer: (obj) => {
+      return qs.stringify(obj);
+    },
+  });
+}