Add tab completions for fish shell

This is a little something I worked up (with some help :robot:) to make my life easier as a `fish` user: `~/.config/fish/completions/ollama.fish` ```fish function __ollama_list set -l query (string join ' ' $argv) ollama list $query | awk 'NR > 1 { gsub(/:latest$/, "", $1); print $1 }' end # Complete subcommands for ollama with descriptions complete -c ollama -n '__fish_use_subcommand' -f -a "serve" -d "Start ollama" complete -c ollama -n '__fish_use_subcommand' -f -a "create" -d "Create a model from a Modelfile" complete -c ollama -n '__fish_use_subcommand' -f -a "show" -d "Show information for a model" complete -c ollama -n '__fish_use_subcommand' -f -a "run" -d "Run a model" complete -c ollama -n '__fish_use_subcommand' -f -a "pull" -d "Pull a model from a registry" complete -c ollama -n '__fish_use_subcommand' -f -a "push" -d "Push a model to a registry" complete -c ollama -n '__fish_use_subcommand' -f -a "list ls" -d "List models" complete -c ollama -n '__fish_use_subcommand' -f -a "ps" -d "List running models" complete -c ollama -n '__fish_use_subcommand' -f -a "cp" -d "Copy a model" complete -c ollama -n '__fish_use_subcommand' -f -a "rm" -d "Remove a model" complete -c ollama -n '__fish_use_subcommand' -f -a "help" -d "Help about any command" # Add --help flag for all subcommands for subcmd in serve create show run pull push list ls ps cp rm help complete -c ollama -n "__fish_seen_subcommand_from $subcmd" -l help -s h -d "Help for $subcmd" end # Complete options for ollama create command complete -c ollama -n '__fish_seen_subcommand_from create' -l file -s f -d 'Name of the Modelfile (default "Modelfile")' complete -c ollama -n '__fish_seen_subcommand_from create' -l quantize -s q -d 'Quantize model to this level (e.g. q4_0)' # Complete options for ollama show command complete -c ollama -n '__fish_seen_subcommand_from show' -l license -d 'Show license of a model' complete -c ollama -n '__fish_seen_subcommand_from show' -l modelfile -d 'Show Model…