refactor: improve API readability and tidy actions submodules (#2593)

* refactor: improve API readability, tidy actions modules

* Apply requested changes

* `actions/reloaders/reloaders.lua` -> `actions/reloaders.lua`

---------

Co-authored-by: Alexander Courtis <alex@courtis.org>

lua/nvim-tree/marks/bulk-move.lua

@@ -40,7 +40,7 @@ function M.bulk_move()
     marks.clear_marks()
 
     if not M.config.filesystem_watchers.enable then
-      require("nvim-tree.actions.reloaders.reloaders").reload_explorer()
+      require("nvim-tree.actions.reloaders").reload_explorer()
     end
   end)
 end