Add support for an array of globs in getComponentsMap

[zachleat]

Right now when you pass an array to getComponentsMap we assume that you’re passing in a list of file names. You may want some of these to be globs.

Practically speaking this is used by the Eleventy WebC plugin when we pass in the components prop, so this would unlock something like this, too:

const pluginWebc = require("@11ty/eleventy-plugin-webc");

module.exports = function(eleventyConfig) {
	eleventyConfig.addPlugin(pluginWebc, {
		components: [
			"_components/**/*.webc",
			"_includes/**/*.webc"
		],
	});
};

[zachleat]

Also gonna sneak in aliasing here too, so you can do this:

const pluginWebc = require("@11ty/eleventy-plugin-webc");

module.exports = function(eleventyConfig) {
	eleventyConfig.addPlugin(pluginWebc, {
		components: [
			"_components/**/*.webc",
			"npm:@11ty/is-land/*.webc"
		],
	});
};