feat: Add a new keybinding to search and expand a certain path (#1014)

doc/nvim-tree-lua.txt

@@ -619,6 +619,7 @@ INFORMATIONS				        *nvim-tree-info*
 - Double left click acts like <CR>
 - Double right click acts like <C-]>
 - `W` will collapse the whole tree
+- `S` will prompt the user to enter a path and then expands the tree to match the path
 
 Defaults to:
 >
@@ -658,7 +659,8 @@ Defaults to:
       { key = "s",                            action = "system_open" },
       { key = "q",                            action = "close" },
       { key = "g?",                           action = "toggle_help" },
-      { key = 'W',                            action = "collapse_all" }
+      { key = 'W',                            action = "collapse_all" },
+      { key = "S",                            action = "search_node" }
     }
 <
 The `list` option in `view.mappings.list` is a table of