improve init package scaffolding baseline starting point

[thescientist13]

Summary

Our current offering as part of the greenwood/init package leaves a bit to be desired, currently dropping user's off with basically nothing. Coming out of a recent team meeting, and with the desire to have a #1247, we should start improving the experience of this workflow, putting it front and center.

So at minimum, we should make it a little more friendly, as this is what we have now, demonstrating a couple basic things like:

1. A basic custom element with DSD
2. Ideally no build configuration
3. Packing as much of everything into a single src/pages/index.html (or an option to get a very vanilla HTML, like the one we have now)
4. Links to things like our docs, getting started, etc
5. Respect system preferences for displaying in light / dark mode

Details

This is what it looks like for tools like Next.js, Vite, and Astro respectively for reference.

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Adjacent issues to track:

1. The getting started should be built to start from this I think, and so the guide should probably be updated accordingly to build from it
   • Markdown / Content as Data
   • Build and Deploy
2. Additional prompts for the init package
   • Using TypeScript?
   • Using markdown?