[sirocco_based] refactor to be based on sirocco-wc

[scherler]

Background

I am currently working on the introduction of web components to be used in cloudbees jenkins plugin development. I created a small framework around lit and tailwind to be able to quickly develop new modern UIs based Jenkins plugins. https://github.com/scherler/sirocco-wc#readme

In case we base our development on a web component based library we can use the design library as we currently know it as a wrapper (to still support plugins that uses them), so it still exposes those tags but underlying it just hands over to a standard web component. That allows us to focus on one central place for the design and the look and feel of server-side rendered components is the same as with a SPA development. In the future, we may want to recommend using the web components directly instead of the jelly ones. e.g. <f:checkbox title="${%Example}" field="hello" /> could become

There are undergoing efforts to create and use a lit-based WC lib https://github.com/halkeye/jenkins-io-components IMOHO this library could be moved here and be a starting point to not only expose jelly tags but as well web components published in npm.

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[scherler]

FYI This PR will fail until jenkinsci/plugin-pom#625 is resolved and released.