Fish Configuration Improvements

[joshmedeski]

So I'm using pnpm with fish and the auto-complete script came out to this in my config.fish file:

# tabtab source for packages
# uninstall by removing these lines
[ -f ~/.config/tabtab/fish/__tabtab.fish ]; and . ~/.config/tabtab/fish/__tabtab.fish; or true

There are a couple of improvements I'd like to suggest and discuss.

1. Move the config file to the ~/.config/fish/completions directory (it won't have to be called in config.fish)
2. Only use pnpm.fish and drop the __tabtab.fish file (simplify how many files are required to setup autocomplete)

Let me know your thoughts and I can make a pull request off of this discussion.

[zkochan]

We use a fork tabtab for autocompletion. If you can make this change, I don't have objections. But it would be good to keep that package a general-purpose package. So that others may use it as well.