New API endpoint to return existing data from feed URL

[piraces]

From Andrew @ nostr with npub1k979np6dcpwh7mkfwk7wq3msezml48fh7wksp9hakakf8pwk3y5qhdz7te (link):

Any thoughts on an API endpoint so that if I send a GET request to https://rsslay.nostr.moe/api/create?url=https://nitter.moomoo.me/paulg/rss for example, it could return json like:
{
"Public Key (Hex)": "09ecfafa65d246a218dea31b941a0a7ff06d4d82e10ca7487176f61a035084fe",
"Public Key": "npub1p8k047n96fr2yxx75vdegxs20lcx6nvzuyx2wjr3wmmp5q6ssnlq76g4xn",
"URL": "https://nitter.moomoo.me/paulg/rss"
}
This would make things easier for the Twitter follows import project I mentioned earlier.

The main idea is to provide an endpoint to retrieve public keys (in hex and npub format) querying by feed URL. The endpoint suggested is the same for creating but it could be other.

[piraces]

Implemented in path /api/feed and documented in README https://github.com/piraces/rsslay#api

Related commit: 4bb07d0