import { FrugalWatcher } from "https://deno.land/x/frugal@0.5.0/packages/core/watch/FrugalWatcher.ts";
start the watch process. By default all modules in the dependency graph
are watched (see
https://deno.land/manual/getting_started/command_line_interface#watch-mode).
If you want to watch additionnal files/folders, pass them to the paths
option.