Add author sub-element to item element in RSS feed(s)

[cointastical]

I'ld like to see author of a post appear in the RSS feed(s).

The RSS 2.0 Spec supports an sub-element, which is for an e-mail address.

https://validator.w3.org/feed/docs/rss2.html#hrelementsOfLtitemgt

I know Lightning address isn't an e-mail address, but it follows that format. So author could be <nym>@stacker.news

If using a LN address for an e-mail address is bad (probably is), the spec allows an extension:

A RSS feed may contain elements and attributes not described on this page, only if those elements and attributes are defined in a namespace.`

https://validator.w3.org/feed/docs/rss2.html#extendingRss https://www.disobey.com/detergent/2002/extendingrss2/