pkg/60065: package asciidoctor-epub3

["rwhitlock22%gmail.com@localhost via gnats" <gnats-admin%NetBSD.org@localhost>]

>Number:         60065
>Category:       pkg
>Synopsis:       package asciidoctor-epub3
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    pkg-manager
>State:          open
>Class:          change-request
>Submitter-Id:   net
>Arrival-Date:   Mon Mar 09 03:25:00 +0000 2026
>Originator:     Robert Whitlock
>Release:        pkgsrc current
>Organization:
>Environment:
NetBSD
>Description:
Trying to fix pkg/60057 (net/wireshark docs not built (can't find asciidoctor)), it seems that wireshark wants asciidoctor-pdf and asciidoctor-epub3. asciidoctor-pdf is in wip as ruby-asciidoctor-pdf but asciidoctor-epub3 is in neither pkgsrc proper nor wip. This PR is to request the packaging of asciidoctor-epub3. It can be found at

https://github.com/asciidoctor/asciidoctor-epub3/
>How-To-Repeat:

>Fix: