Proxy/scraping service usage

The currently unused IRS provider located at witness-sdk/src/providers/irs uses a scraping service, scrape.smartproxy.com, to fetch the user's information from the IRS website. This means that users are trusting a third-party service to fetch their information, which is a potential privacy concern. Additionally, because the TLS connection is terminated at the scrape.smartproxy.com server, Reclaim is only making a claim regarding the response from the scraping service, not the IRS website itself.