New plugin bitbucket-webhooks-plugin

[Nikolas Falco]

I'd like to add a new plugin, bitbucket-webhooks-plugin, to the Jenkins organization on Github (https://github.com/jenkins).
The purpose of this plugin is to provide a container for implementations of the webhook management integration (JENKINS-74913) developed by third-party plugins for Atlassian Bitbucket Server. These plugins typically have a paid license, but offer additional functionality beyond the native implementation.
It doesn't make sense to include them in bitbucket-branch-source-plugin; anyone with a valid license or a developer from one of the third-party companies could provide an initial implementation.
I would initially maintain this plugin myself and then release it to anyone who wants it (I don't have such a license, so it's difficult for me to test these integrations).

[Nikolas Falco]

The new plugin is available at https://github.com/nfalco79/bitbucket-webhooks-plugin