feat: add cache control to IPNS

[achingbrain]

Adds a nocache option when resolving IPNS records similar to when resolving DNSLink records.

The record will be resolved from the local datastore and returned if it is valid (e.g. non-expired, correct key, etc).

If the record is not present it will be fetched from the routing and stored in the local datastore if it is valid.

• nocache will skip the datastore and use the routing.
• offline only uses the datastore and skips the routing.

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