Describe the issue

When splitting configuration into multiple files and loading them using include-file directives, the --reload flag only picks up changes at the top config level.

Expected behavior:
Polybar should also reload when any files referenced with include-file are changed,.

To Reproduce

The simplest way is to create an empty file and reference it from your polybar config, e.g.:

[settings]
margin-top = 0
margin-bottom = 0
include-file = ~/.config/polybar/extra.config

Whenever you run Polybar with --reload and then save changes to extra.config, Polybar should reload.

Additional context

The file system watchers are set in main.cpp:

   if (cli->has("reload")) {
      config_watch = inotify_util::make_watch(conf.filepath());
    }

Fortunately this already happens after configuration is loaded, and it looks like a fairly straight-forward task to keep track of include-file calls and create a watcher for each one.