fix(p2p-editor): use raw file bytes and unique Hyperdrive keys for uploads

[akhileshthite]

Each publish creates a new Hyperdrive, so uploading index.html won’t overwrite the previous site.

Before:

After (ignore the styling):

[RangerMauve]

Ty for tacking a crack at it. I was actually thinking about this recently and I think it'd be better if we did the following instead of what's there now:

• Have a "title" field used to derive the file name
• Always publish to the same IPNS/Hyper collection but under different files
• Make sure we base the styles off of theme/style.css
• Update the tutorial to reflect these changes

The benefit here is we'd have an easier time managing published sites and have an easy way to showcase all your fiddles. Should also make pinning more straightforward for those that want it.

IMO if we want to get rid of the form data method here for uploading we should do so for both protocols. In this case we're only ever uploading one file so we might as well do the simple PUT method.

Mind moving the changes to explore.md into a separate PR?

[akhileshthite]

IPNS is not necessary here since each file update generates a new IPFS CID. But yeah it's hard to manage.

I will update the tutorial once this looks good to you.