feat(server): introduce admin reset functionality and enhance user management

- Added a new `reset-admin` script to reset or create the admin username and password.
- Updated the README to include instructions for resetting the admin login.
- Enhanced user management by allowing username updates during admin reset.
- Defaulted new resources to the internal namespace `local` for better organization.
- Removed unused owner selection from various components to streamline the UI.

Co-authored-by: Nasyarobby Putra <nasyarobby@gmail.com>

packages/server/src/api/scripts.js

@@ -258,7 +258,7 @@ export default function scriptsPluginFactory(registry) {
         req.body ?? {}
       );
 
-      let owner = "default";
+      let owner = "local";
       if (body.owner != null && body.owner !== "") {
         try {
           owner = fsStore.assertOwner(String(body.owner));