Revamp plugin

[janfaracik]

The intention is to overhaul the plugin, using a modern framework and design system, to ensure it's straightforward to maintain going forward. It takes heavy inspiration from the structure of http://github.com/jenkinsci/pipeline-graph-view-plugin/ - I've found that that works really quite well and makes development easy.

What's new?

• New user interface
  • Matches the new Jenkins header
  • Follows Jenkins Design Library
  • Now supports Customisable Header plugin
  • Now follows user theme
• Pages can now have descriptions (appears in the header)
• Reduce animations has been replaced with a media query (set reduced animations in your system settings instead)
• New codebase in React
  • React 19, Vite, Rspack

Closes #61
Closes #348
Closes #743
Closes #744
Closes #747

TODO

• Improve error handling
• Improve badges
• Add JUnit support
• Add cause/blame support
• Update preview image in README

Testing done

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

[timja]

The build failure analyzer doesn't look amazing, did it look like this before?

[timja]

I assume the reason themes aren't working is this line?
https://github.com/jenkinsci/theme-manager-plugin/blob/71a0ddc3732259908c096b897d611b9a5cb28fa8/src/main/java/io/jenkins/plugins/thememanager/ThemeManagerPageDecorator.java#L175

Should be safe to remove?

[timja]

Before:

After:

[janfaracik]

What are your thoughts @timja? There's a few issues but nothing major right now, definitely needs some iteration but would be good to get it out into the wild

[timja]

There’s some minor things left but they can be small follow ups

Addressed

[mawinter69]

Don't hard code the java version. The required java version is set by the parent pom.