Introduce an abstraction for DOM parsing

[janbuchar]

• Similar to refactor!: Refactor HttpCrawler, BeautifulSoupCrawler, ParselCrawler inheritance crawlee-python#746
• See also https://github.com/apify/crawlee-python/blob/master/src/crawlee/crawlers/_abstract_http/_abstract_http_parser.py#L21-L21

[B4nan]

Sounds like a good candidate for Richard