Re-level non-docs content to top of repo and rename content→docs

docs/tutorials/tasks/manage-account-settings/index.md

@@ -0,0 +1,12 @@
+---
+html: manage-account-settings.html
+parent: tasks.html
+metadata:
+  indexPage: true
+---
+# Manage Account Settings
+
+Set up your XRP Ledger account to send and receive payments the way you want it to.
+
+
+{% child-pages /%}