refactor(#3255): merge api pre and post

Author: alex-courtis

lua/nvim-tree.lua

@@ -309,7 +309,7 @@ function M.setup(config_user)
   vim.g.NvimTreeSetup = 1
   vim.api.nvim_exec_autocmds("User", { pattern = "NvimTreeSetup" })
 
-  require("nvim-tree.api.impl.post").hydrate_post_setup(api)
+  require("nvim-tree.api.impl").hydrate_post_setup(api)
 end
 
 vim.g.NvimTreeRequired = 1

lua/nvim-tree/api.lua

@@ -96,6 +96,6 @@ local api = {
   live_filter = require("nvim-tree._meta.api.deprecated").live_filter, ---@deprecated
 }
 
-require("nvim-tree.api.impl.post").hydrate_pre_setup(api)
+require("nvim-tree.api.impl").hydrate_pre_setup(api)
 
 return api