Config formatters/language servers/etc. as a list to allow first item as default and subsequent as fallback choices

[heyakyra]

Summary

Currently, users can specify their own languages.toml but it would be nicer still for the root file in helix's codebase to be able to specify a list of possible formatters, etc.

To make it easier for most people with different preferences, if they do not have the default installed, then the next options can be tried automatically. If they have multiple installed but have a different preference, they can override the default priorities in their local config.

This has come up a few times in this PR #12096:

@NikitaRevenco commented:

It would be nice for helix to configure multiple formatters, if it makes sense for the language

@NikitaRevenco commented:

what about prettierd but fallback to prettier if prettierd isn't found? If this is possible

Platform

All

Terminal Emulator

alacritty

Installation Method

source (why no crates.io package for easy cargo install? 😢)

Helix Version

helix 24.7 (079f544)