feat: add `record`/`answer` fields to IPNS results

[achingbrain]

Adds fields to IPNS results:

record: present in the return from ipns.resolve - contains the resolved IPNS record.

answer: present in the return from ipns.resolveDNSLink - contains the resolved DNS Answer.

Change checklist

• [x] I have performed a self-review of my own code
• [x] I have made corresponding changes to the documentation if necessary (this includes comments as well)
• [x] I have added tests that prove my fix is effective or that my feature works

[achingbrain]

It's non-breaking because we're just adding some more fields to the return types, rather than removing fields or changing the type from, like string to object or whatever.

I mentioned a breaking change on the maintainers call because I mis-remembered us returning strings, turns out we return objects so we're all good.