nix: switch to nixd cause I hate nil

nix/neovim-overlay.nix

@@ -100,7 +100,7 @@ with final.pkgs.lib; let
     lua-language-server
     clang-tools # provides clangd which is a c/c++ lsp
     jdt-language-server # java ls
-    nil # nix LSP
+    nixd # nix LSP
 
     # autoformatters
     alejandra # amazing nix autoformatter

nvim/ftplugin/nix.lua

@@ -1,5 +1,5 @@
 -- Exit if the language server isn't available
-if vim.fn.executable('nil') ~= 1 then
+if vim.fn.executable('nixd') ~= 1 then
   return
 end
 
@@ -9,8 +9,8 @@ local root_files = {
 }
 
 vim.lsp.start {
-  name = 'nil_ls',
-  cmd = { 'nil' },
+  name = 'nixd',
+  cmd = { 'nixd' },
   root_dir = vim.fs.dirname(vim.fs.find(root_files, { upward = true })[1]),
   capabilities = require('user.lsp').make_client_capabilities(),
 }