Feature: Export as module

### Type of feature

✨ Feature

### Current behavior

Can only export as variations of full HTML pages.

### Suggested feature

It would be valuable to be able to edit a script which can then be built and exported as a reusable module rather than only as a webpage. In this case, markup/style would either be unneeded or used during dev only for testing integrating the module. I'd like to be able to define some functions that I can then export, host somewhere, and reuse as imports in another livecodes session.

### Additional context

_No response_

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### Contributing Docs

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