added elm formatter

nvim/lua/settings/lazy/plugins/conform.lua

@@ -25,7 +25,8 @@ return {
       formatters_by_ft = {
         lua = { "stylua" },
         javascript = { "eslint_d" },
-        php = { "phpcbf" }
+        php = { "phpcbf" },
+        elm = { "elm_format" }
       },
     })