doc: add nvim-lspconfig example

examples/nvim/init.lua

@@ -41,14 +41,20 @@ local lsp_ai_init_options_json = [[
 }
 ]]
 
--- The configuration
+-- The easiest way to configure the language server is to use the nvim-lspconfig plugin: https://github.com/neovim/nvim-lspconfig
+-- Use the following snippet to configure it after installing it with the plugin manager of your choice.
+require('nvim-lspconfig').lsp_ai.setup {
+  -- See the nvim-lspconfig docs for the supported parameters on top of the init_options at https://github.com/neovim/nvim-lspconfig/blob/master/doc/lspconfig.txt
+  root_dir = vim.loop.cwd(),
+  init_options = lsp_ai_init_options,
+}
+
+-- Start lsp-ai or attach the active instance when opening a buffer, handled automatically when using nvim-lspconfig
 local lsp_ai_config = {
   cmd = { 'lsp-ai' },
   root_dir = vim.loop.cwd(),
-  init_options = vim.fn.json_decode(lsp_ai_init_options_json),
+  init_options = lsp_ai_init_options,
 }
-
--- Start lsp-ai when opening a buffer
 vim.api.nvim_create_autocmd("BufEnter", {
   callback = function(args)
     local bufnr = args.buf