Add support for additional (SSR) rendering options through a render plugin type

[thescientist13]

Type of Change

• New Feature Request
• Documentation / Website
• Improvement / Suggestion
• Bug
• Other (please clarify below)

Summary

As part of ongoing discovery in #576 , one the key action item needed is to be able to facilitate different rendering options so there can be an alternative to only being able to use puppeteer.

Details

As part of adding this new render plugin, puppeteer should be moved into a plugin of its own under the @greenwood namespace and become a peerDependency.

As bonus points, would be nice to see if this could only be installed as needed to avoid the issue of having to pull down an entire browser if don't even have any JS. (e.g. the npx hello world / getting started scenarios)

When #855 is added, by virtue of a user providing their own custom renderer, we should set prerender: true and use their renderer instead.