feat(rules): add new configurable rules for deprecated operations

[jeremyfiel]

New ruleset for enforcing a deprecation strategy with Deprecation, Sunset and Link headers.

[tatomyr]

I'd prefer having this as a new ruleset instead of separate rules. First, they are closely related and it makes sense to use them together. Second, there's no particular complexity in defining such rules, and the value comes not from the configuration examples, but rather from using the rules themselves.
Then, it would be really easy to use the ruleset with this config in redocly.yaml:

extends:
- recommended # or something
- https://..... # the ruleset uri