feat(notify): switch all print/nvim_*write statements to utils.notify

lua/nvim-tree/events.lua

@@ -1,3 +1,5 @@
+local utils = require "nvim-tree.utils"
+
 local M = {}
 
 local global_handlers = {}
@@ -28,7 +30,7 @@ local function dispatch(event_name, payload)
   for _, handler in pairs(get_handlers(event_name)) do
     local success, error = pcall(handler, payload)
     if not success then
-      vim.api.nvim_err_writeln("Handler for event " .. event_name .. " errored. " .. vim.inspect(error))
+      utils.notify.error("Handler for event " .. event_name .. " errored. " .. vim.inspect(error))
     end
   end
 end