Merged in feat/SW-1381-new-startpage-page (pull request #1197)

feat(SW-1381): add initial start page

* feat(SW-1381): add initial start page

* fix: remove unused startpage template

remove translation key for middleware error page

* fix(SW-1381): add tracking SDK and feature flag to hide start page


Approved-by: Erik Tiekstra
Approved-by: Matilda Landström
Approved-by: Chuma Mcphoy (We Ahead)

app/[lang]/(live)/middleware-error/[status]/page.tsx

@@ -1,4 +1,3 @@
-import { getIntl } from "@/i18n"
 import { setLang } from "@/i18n/serverContext"
 
 import styles from "./page.module.css"
@@ -10,17 +9,9 @@ export default async function MiddlewareError({
 }: LayoutArgs<LangParams & StatusParams>) {
   setLang(params.lang)
 
-  const intl = await getIntl()
-
   return (
     <div className={styles.layout}>
-      {intl.formatMessage(
-        { id: "Middleware error {lang}: {status}" },
-        {
-          lang: params.lang,
-          status: params.status,
-        }
-      )}
+      Middleware error {params.lang}: {params.status}
     </div>
   )
 }