Add xReverseLabs Domain Dataset

[yon3zu]

Description of changes:
This pull request adds the xReverseLabs Domain Dataset to the AWS Open Data Registry.

Dataset details:

• Daily Domain Dump Dataset (plain text, one domain per line)
• Domain by Date Full Data (historical daily unique domains)
• Domain by Extension Dataset (domains grouped by TLD, .txt.gz format)
• Forward DNS (FDNS) Dataset (JSON records of DNS resolutions)

Repository with example notebooks:
https://github.com/xReverseLabs/open-data-examples

Documentation:
https://opendata.xreverselabs.org/about.php

License: CC-BY 4.0

This dataset supports threat intelligence, academic research, and large-scale DNS measurements.

[pschmied]

Hi @yon3zu, thank you for opening this pull request, and apologies for the delay in our review. This is a good start to proceed with onboarding. Two items:

1. Can you ensure that you have permitted us, as upstream maintainers, to modify your pull request per these instructions? https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/working-with-forks/allowing-changes-to-a-pull-request-branch-created-from-a-fork

We will need to ensure that your branch is up-to-date with any other changes that have happened in the Registry in the meantime.

2. Your notebook tutorial is a good start. Before launch, we'll ask that you expand on at least one of the ideas in the last section. We'd like to see enough of a problem description there that e.g. someone could read your problem statement and run with it. The current text is a bit sparse / ambiguous for someone to understand the problem / challenge you are issuing.