refacto: abstract TreeExplorer in core.lua

lua/nvim-tree/actions/copy-paste.lua

@@ -3,6 +3,7 @@ local uv = vim.loop
 
 local lib = require "nvim-tree.lib"
 local utils = require "nvim-tree.utils"
+local core = require "nvim-tree.core"
 
 local M = {}
 
@@ -168,7 +169,7 @@ end
 
 function M.copy_path(node)
   local absolute_path = node.absolute_path
-  local relative_path = utils.path_relative(absolute_path, TreeExplorer.cwd)
+  local relative_path = utils.path_relative(absolute_path, core.get_cwd())
   local content = node.nodes ~= nil and utils.path_add_trailing(relative_path) or relative_path
   return copy_to_clipboard(content)
 end