refactor(actions): move actions into semantic modules (#1410)

lua/nvim-tree/actions/root/dir-up.lua

@@ -0,0 +1,16 @@
+local utils = require "nvim-tree.utils"
+local core = require "nvim-tree.core"
+
+local M = {}
+
+function M.fn(node)
+  if not node or node.name == ".." then
+    return require("nvim-tree.actions.root.change-dir").fn ".."
+  else
+    local newdir = vim.fn.fnamemodify(utils.path_remove_trailing(core.get_cwd()), ":h")
+    require("nvim-tree.actions.root.change-dir").fn(newdir)
+    return require("nvim-tree.actions.finders.find-file").fn(node.absolute_path)
+  end
+end
+
+return M