@Nonnull
	static ResourceResolver forResources() {
		return new CombinedResourceResolver(
				new RemoteResourceResolver(true),
				new ClasspathResourceResolver(),
				new FileResourceResolver());
	}
Factory method that returns a resource resolver that knows how to deal with
simple resource files (so it's _not_ meant for resolving sources/scripts).

@return A <code>ResourceRef</code> or <code>null</code>
src/main/java/dev/jbang/source/ResourceResolver.java