Add RedoxFS support
RedoxFS is a simple file system implemented in pure Rust used by the RedoxOS project. This may be the easiest file system to port to Robigalia.
Re-use of pure-Rust code for implementing a filesystem. Since RedoxOS is a microkernel OS, it may be easier to port RedoxFS versus a filesystem designed for Linux, that assumes a monolithic kernel.
It is unclear whether RedoxOS intends to keep using RedoxFS once their ZFS work is completed.