feat(nvim): add null-ls for formatting

nvim/.config/nvim/lua/opdavies/lsp/null-ls.lua

@@ -0,0 +1,13 @@
+local status_ok, null_ls = pcall(require, "null-ls")
+if not status_ok then
+  return
+end
+
+null_ls.setup({
+    sources = {
+        null_ls.builtins.formatting.prettier,
+        null_ls.builtins.formatting.stylua,
+        null_ls.builtins.diagnostics.eslint,
+        null_ls.builtins.completion.spell,
+    },
+})

nvim/.config/nvim/lua/opdavies/plugins.lua

@@ -75,6 +75,7 @@ return packer.startup(function()
 
   -- LSP
   use 'neovim/nvim-lspconfig'
+  use 'jose-elias-alvarez/null-ls.nvim'
 
   -- Telescope
   use 'nvim-telescope/telescope.nvim'