evaluate and adopt `ElementRenderer` interface

[thescientist13]

Type of Change

• New Feature Request

Summary

The WCCG and Lit have started drafting an interface for server side rendering of Web Components. Making this issue to track and evaluate, and adopt if consensus seems viable.

Details

• Server-Side Rendering (SSR) API webcomponents-cg/community-protocols#7
• [SSR] Native `HTMLElement` support lit/lit#2092