Customize admin-dashboard.astro layout

[drewatdrawn]

This is a feature request - the plugin is great to quickly add the Netlify CMS to an Astro project, but eliminates the ability to modify the /admin page (favicon, title, additional stylesheets, etc.) as it's bundled with the package.

It would be great to expose an optional admin-layout.astro file that could be used to customize the dashboard. Not sure what the best path forward is, but I may end up dropping the package and configuring everything manually so I can retain control over the admin.html page.

Is there an easy way to modify the admin page currently?