Feature Request: --models-preset-path to complement llama-server's --models-preset

[sowbug]

Big fan of --models-preset. I'd like to be able to specify relative paths for the model = argument so that models.ini is less machine-specific. I can do this if I specify the working directory when I launch my llama-server, but that often takes some OS- or distro-specific knowledge (systemd etc.), and it's not always what you want.

Proposal: add an optional --models-preset-path parameter that is used as a prefix to relative paths specified in the --models-preset file. Similar to --media-path or --path. If it's omitted, then the server uses the cwd, as it does today.