fix: parse path/subdomain gateway url as ipfs/ipns url

[achingbrain]

Converts path/subdomain gateway urls to ipfs/ipns urls before handing off to verified fetch.

Enables cache and directory listing conformance tests.

Change checklist

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