Idiomatically set custom defaults for tabstops per filetype in nvf

[ppenguin]

I know I can do something like

         vim.api.nvim_create_autocmd("FileType", {
           pattern = "sh",
           callback = function()
             vim.bo.shiftwidth = 4
             vim.bo.softtabstop = 4
             vim.bo.expandtab = true
           end,
         })

but is there an idiomatic (less boiler-plate) way to pass per-file formatting defaults e.g. to conform or something like that?

[NotAShelf]

The current method for doing this is using Lua. Alternatively, you can append an additional directory to the runtime and dump your ftplugin dirs in there. Though, neither are idiomatic.

#1304 is relevant; I'm planning to add a Nix interface for automatically creating a runtime directory that creates ftplugin dirs and their contents. For the time being, doing it with Lua is the best (and only) way to go.