Feat/better fetch

[Gozala]

No description provided.

[BigLep]

We're on pause on here until we see if @achingbrain's merge into node-fetch get accepted.

[achingbrain]

Taking on the long term maintenance burden of a node-fetch fork worries me a little, despite node-fetch being a little rough around the edges.

This is the pending PR: node-fetch/node-fetch#1172 - if it doesn't get merged maybe @web-std/fetch becomes a viable alternative but I think we should exhaust all other possibilities first.

[Gozala]

Let's reopen if we choose to do it in the future. For what it's worth we're using @web-std/fetch in bunch of places in the nft.storage.