[Research] POC outputting framework-specific code snippets in Astro docs

[RasmusKjeldgaard]

• [x] Clarify if we can create separate framework-specific builds with astro on compile time
• [ ] Clarify how framework-specific code snippets can be written and inlined in mdx docs on the fly - and run within the actual framework, so the rendered output actually comes from e.g. a react component