Add jsoup API plugin

[jonesbusy]

Add jsoup API plugin

Recently refreshed, will be easily 4-5 consumer according to https://github.com/search?q=org%3Ajenkinsci+path%3A**%2Fsrc%2Fmain%2Fjava**++%22jsoup%22+&type=code

Testing done

PLUGINS=jsoup TEST=InjectedTest bash local-test.sh

Submitter checklist

• Make sure you are opening from a topic/feature/bugfix branch (right side) and not your main branch!
• Ensure that the pull request title represents the desired changelog entry
• Please describe what you did
• Link to relevant issues in GitHub or Jira
• Link to relevant pull requests, esp. upstream and downstream changes
• Ensure you have provided tests - that demonstrates feature works or fixes the issue

[jonesbusy]

Except [2025-02-10T21:12:44.887Z] [ERROR] Could not transfer artifact org.jenkins-ci.main:jenkins-war:war:2.479.1 from/to azure-aks-internal (http://artifact-caching-proxy.artifact-caching-proxy.svc.cluster.local:8080/): Premature end of Content-Length delimited message body (expected: 96,008,718; received: 1,637,455) I don't see any other issue

[gounthar]

I guess the artifact caching proxy is failing. 🤷