Merged in feature/sas-mypages (pull request #1302)

Feature/sas mypages

* feat: Add SAS partner page under my pages
* fix: feature toggle SAS Partner page in my pages
* add translations for SAS account page
* use 'flex-start' instead of 'start'
* fix: flatten css
* fix: don't use <SectionContainer /> on linkedAccounts page

app/[lang]/(live)/(protected)/loading.tsx

@@ -0,0 +1,5 @@
+import LoadingSpinner from "@/components/LoadingSpinner"
+
+export default function Loading() {
+  return <LoadingSpinner fullPage />
+}