Add webhook to auto-responder extension or add generic webhook extension to replace non-functional Slack/Teams plugins

Since the Slack plugin is no longer available on the extension marketplace, and the old version is now broken in version 22, with no sign that this will be addressed, can we at least get the source code of the old Slack extension and the auto-responder extension so that webhook capability can be added?

All I need is a generic webhook plugin and I can forward messages via webhook to Slack, Discord, or a variety of other platforms, I just would like to not have to reinvent the wheel here since there was already a functional Slack plugin, and the auto-responder plugin has all the functionality except the option to also send a webhook API call instead of an email.