Add log mail driver support to frontend

The default mail driver in config/mail.php is 'log', which had no
matching Vue component, causing the mail configuration step in the
install wizard (and settings page) to render empty.

resources/scripts/admin/views/installation/Step5EmailConfig.vue

@@ -31,6 +31,7 @@ export default {
     Ses,
     sendmail: Basic,
     Mail: Basic,
+    log: Basic,
   },
 
   emits: ['next'],

resources/scripts/admin/views/settings/MailConfigSetting.vue

@@ -69,6 +69,7 @@ const mailDriver = computed(() => {
   if (mailDriverStore.mail_driver == 'sendmail') return Basic
   if (mailDriverStore.mail_driver == 'ses') return Ses
   if (mailDriverStore.mail_driver == 'mail') return Basic
+  if (mailDriverStore.mail_driver == 'log') return Basic
   return Smtp
 })