Branding options

[goto-bus-stop]

For wlk.yt, we override a few things in the web client to inject our own logo etc. It would be nice if this could be done with runtime configuration, so everyone doesn't need to fork the web client just to replace the logo or favicon.

Related, a runtime-configurable uw.setAboutPageComponent() would be fantastic, maybe based on xdm. (← should pull this out to a separate issue once basic branding options are implemented)

Further thoughts

xdm outputs ESM. maybe we can import that directly on the client using https://github.com/WebReflection/import.js

Maybe even better: https://github.com/kentcdodds/mdx-bundler

Probably depends on u-wave/core#397.