feat: add a link back to the site on the login page (#4262)

#### What type of PR is this?

/area console
/kind feature
/milestone 2.8.0

#### What this PR does / why we need it:

在登录页面添加返回到前台的链接。


<img width="506" alt="image" src="https://github.com/halo-dev/halo/assets/21301288/31c6311d-7153-4028-b2dd-78d89e018bf3">



#### Which issue(s) this PR fixes:

Fixes https://github.com/halo-dev/halo/issues/4175

#### Does this PR introduce a user-facing change?

```release-note
在 Console 的登录页面添加返回到前台的链接。
```

console/src/locales/en.yaml

@@ -17,6 +17,7 @@ core:
       return_login:
         label: Already have an account
         button: Sign in
+      return_site: Return to site
     button: Login
     modal:
       title: Re-login

console/src/locales/zh-CN.yaml

@@ -17,6 +17,7 @@ core:
       return_login:
         label: 已有账号
         button: 立即登录
+      return_site: 返回到首页
     button: 登录
     modal:
       title: 重新登录

console/src/locales/zh-TW.yaml

@@ -17,6 +17,7 @@ core:
       return_login:
         label: 已有帳號
         button: 立即登入
+      return_site: 返回到首頁
     button: 登入
     modal:
       title: 重新登入

console/src/modules/system/users/Login.vue

@@ -12,6 +12,7 @@ import { AppName } from "@/constants/app";
 import { locales, getBrowserLanguage, i18n } from "@/locales";
 import MdiTranslate from "~icons/mdi/translate";
 import { useLocalStorage } from "@vueuse/core";
+import MdiKeyboardBackspace from "~icons/mdi/keyboard-backspace";
 
 const { globalInfo } = useGlobalInfoFetch();
 const { t } = useI18n();
@@ -87,6 +88,15 @@ watch(
           }}
         </span>
       </div>
+      <div class="flex justify-center pt-3.5">
+        <a
+          class="inline-flex items-center gap-0.5 text-xs text-gray-600 hover:text-gray-900"
+          href="/"
+        >
+          <MdiKeyboardBackspace class="!h-3.5 !w-3.5" />
+          <span> {{ $t("core.login.operations.return_site") }} </span>
+        </a>
+      </div>
     </div>
     <div
       class="bottom-0 mb-10 mt-auto flex items-center justify-center gap-2.5"