feat: Zitadel translated into Spanish (#5634)

* feat: spanish translation in progress

* feat: 85% of translated strings

* feat: spanish translation 95% done

* fix: fix some typos

* fix: add missing translations for recent commits

* Apply suggestions from code review

Co-authored-by: Livio Spring <livio.a@gmail.com>

---------

Co-authored-by: Elio Bischof <elio@zitadel.com>
Co-authored-by: Livio Spring <livio.a@gmail.com>

internal/api/ui/login/static/i18n/zh.yaml

@@ -221,6 +221,7 @@ RegistrationUser:
   Chinese: 简体中文
   Polish: Polski
   Japanese: 日本語
+  Spanish: Español
   GenderLabel: 性别
   Female: 女性
   Male: 男性
@@ -253,6 +254,7 @@ ExternalRegistrationUserOverview:
   Chinese: 简体中文
   Polish: Polski
   Japanese: 日本語
+  Spanish: Español
   TosAndPrivacyLabel: 条款和条款
   TosConfirm: 我接受
   TosLinkText: 服务条款
@@ -313,6 +315,7 @@ ExternalNotFound:
   Chinese: 简体中文
   Polish: Polski
   Japanese: 日本語
+  Spanish: Español
 
 Footer:
   PoweredBy: Powered By