feat(core): server-render custom elements

[ayoayco]

Include the HTML of custom elements on the server response so if the browser doesn’t have js enabled they will still see the initial ui.

There are several ways of writing custom elements, and here's a general checklist (we can update during implementation)

• [ ] https://webcomponent.io -- has a template property that we can use to resolve the initial HTML string
• [ ] vanilla custom elements -- here's a good write up on implementing Astro integration for generic SSR for custom elements: https://dev.to/thepassle/server-side-rendering-vanilla-custom-elements-in-astro-5hgg

Some references that could be useful:

1. https://stackoverflow.com/questions/494143/creating-a-new-dom-element-from-an-html-string-using-built-in-dom-methods-or-pro#494348
2. https://web.dev/articles/custom-elements-best-practices

[ayoayco]

Closed this approach as not planned. Will explore different way