add Gitignore (#251)

lua/nvim-tree/utils.lua

@@ -1,4 +1,5 @@
 local M = {}
+local uv = vim.loop -- or require("luv") ? i dont understand
 local api = vim.api
 
 function M.path_to_matching_str(path)
@@ -11,6 +12,16 @@ function M.echo_warning(msg)
   api.nvim_command('echohl None')
 end
 
+function M.read_file(path)
+  local fd = uv.fs_open(path, "r", 438)
+  if not fd then return '' end
+  local stat = uv.fs_fstat(fd)
+  if not stat then return '' end
+  local data = uv.fs_read(fd, stat.size, 0)
+  uv.fs_close(fd)
+  return data or ''
+end
+
 local path_separator = package.config:sub(1,1)
 function M.path_join(paths)
   return table.concat(paths, path_separator)