Add scary sounding override for running as root warning

[ToasterUwU]

Currently, there is no way to accept the risks and hide the "Manyfold is running as root, which is a security risk. Run as a different system user by setting the PUID and PGID environment variables. See the configuration documentation for details." warning message.

For cases like mine where there is nothing to be scared of and no other user I could use without creating it first just for the sake of the message going away, there should be a way to disable it. Not an easy-to-find button, it should be scary to do so without knowing what you are doing. Like an ENV var called "SUDO_RUN_UNSAFELY" for example.