move lib.get_node_at_cursor to Explorer

lua/nvim-tree/lib.lua

@@ -1,6 +1,5 @@
 local view = require("nvim-tree.view")
 local core = require("nvim-tree.core")
-local utils = require("nvim-tree.utils")
 local events = require("nvim-tree.events")
 local notify = require("nvim-tree.notify")
 
@@ -13,25 +12,6 @@ local M = {
   target_winid = nil,
 }
 
----@return Node|nil
-function M.get_node_at_cursor()
-  local explorer = core.get_explorer()
-  if not explorer then
-    return
-  end
-
-  local cursor = explorer:get_cursor_position()
-  if not cursor then
-    return
-  end
-
-  if cursor[1] == 1 and view.is_root_folder_visible(core.get_cwd()) then
-    return explorer
-  end
-
-  return utils.get_nodes_by_line(explorer.nodes, core.get_nodes_starting_line())[cursor[1]]
-end
-
 ---Api.tree.get_nodes
 ---@return Node[]?
 function M.get_nodes()