feat: use nixfmt for nix files

common/nvim/init.lua

@@ -435,6 +435,15 @@ require("lazy").setup({
 
       require("lazy-lsp").setup({
         configs = {
+          nil_ls = {
+            settings = {
+              ['nil'] = {
+                formatting = {
+                  command = { "nixfmt" },
+                },
+              },
+            },
+          },
           lua_ls = {
             settings = {
               Lua = {
@@ -465,7 +474,6 @@ require("lazy").setup({
 
         go = { "gofmt" },
 
-				nix = { "nixpkgs_fmt" },
         --
         -- You can use a sub-list to tell conform to run *until* a formatter
         -- is found.