feat!: oil is not default file explorer

Author: Allaman

lua/vnext/plugins/file-manager.lua

@@ -5,7 +5,6 @@ return {
       { "-", "<cmd>Oil<cr>", desc = "Open Oil" },
     },
     opts = {
-      default_file_explorer = true,
       delete_to_trash = true,
       skip_confirm_for_simple_edits = true,
     },