refactor(#2941): move lib methods to explorer (#2964)

* add todo

* refactor(#2886): multi instance: node class refactoring: extract links, *_git_status (#2944)

* extract DirectoryLinkNode and FileLinkNode, move Node methods to children

* temporarily move DirectoryNode methods into BaseNode for easier reviewing

* move mostly unchanged DirectoryNode methods back to BaseNode

* tidy

* git.git_status_file takes an array

* update git status of links

* luacheck hack

* safer git_status_dir

* refactor(#2886): multi instance: node class refactoring: DirectoryNode:expand_or_collapse (#2957)

move expand_or_collapse to DirectoryNode

* refactor(#2886): multi instance: node group functions refactoring (#2959)

* move last_group_node to DirectoryNode

* move add BaseNode:as and more doc

* revert parameter name changes

* revert parameter name changes

* add Class

* move group methods into DN

* tidy group methods

* tidy group methods

* tidy group methods

* tidy group methods

* parent is DirectoryNode

* tidy expand all

* BaseNode -> Node

* move watcher to DirectoryNode

* last_group_node is DirectoryNode only

* simplify create-file

* simplify parent

* simplify collapse-all

* simplify live-filter

* style

* move lib.get_cursor_position to Explorer

* move lib.get_node_at_cursor to Explorer

* move lib.get_nodes to Explorer

* move place_cursor_on_node to Explorer

* resolve resource leak in purge_all_state

* move many autocommands into Explorer

* post merge tidy

lua/nvim-tree/node/directory-link.lua

@@ -32,6 +32,10 @@ function DirectoryLinkNode:create(explorer, parent, absolute_path, link_to, name
   return o
 end
 
+function DirectoryLinkNode:destroy()
+  DirectoryNode.destroy(self)
+end
+
 -----Update the directory GitStatus of link target and the file status of the link itself
 -----@param parent_ignored boolean
 -----@param status table|nil