Add type hint for vim.opt.rtp

Author: oriori1703

init.lua

@@ -223,8 +223,11 @@ if not (vim.uv or vim.loop).fs_stat(lazypath) then
   if vim.v.shell_error ~= 0 then
     error('Error cloning lazy.nvim:\n' .. out)
   end
-end ---@diagnostic disable-next-line: undefined-field
-vim.opt.rtp:prepend(lazypath)
+end
+
+---@type vim.Option
+local rtp = vim.opt.rtp
+rtp:prepend(lazypath)
 
 -- [[ Configure and install plugins ]]
 --