feat(crawler): load Sitemap URLs

Feature request

1. Summary of expected behavior

⌦ Describe what you want to accomplish, in what role/capacity, and why it's important to you.

As a consumer,
I want to collect sitemap URLs using only the hd-product-extractor,
in order to simplify usage and save time.

2. Acceptance criteria

We'll be done when hd-product-extractor:

1. Exposes the Sitemap.load method.

3. Notes

Fig. 1: Interface suggestions
Typescript

import HomeDepotProductExtractor, {
  homeDepotCrawlerOptions
} from './crawlers/hd'

homeDepotCrawlerOptions.maxRequestsPerCrawl = 20
const urls = [
  'https://www.homedepot.com/sitemap/P/PIPs/21/021-001-0.xml'
]
const extractor =
  new HomeDepotProductExtractor(homeDepotCrawlerOptions)
await extractor.run(urls)