decided to make this because the other tools could not convert my .nex to .fa

Usage: nexus2fa -n/--nexus <NEXUS> -f/--fasta <FASTA>

Arguments:
    -n, --nexus <NEXUS>: NEXUS file
    -f, --fasta <FASTA>: FASTA file

Options:
    --help: print help
    --version: print version

to build nexus2fa from this repo, do:

1. get rust
2. run git clone https://github.com/alejandrogzi/nexus2fa.git && cd nexus2fa
3. run cargo run --release -- -n <NEXUS> -f <FASTA>