Component code doc example should show "embed"/"include" examples

[gerardo-rodriguez]

There seems to have been a regression.

Before code example docs showed embed/include examples (image pulled from #1607):

Instead, they now show HTML markup:

[tylersticka]

I tried taking a look at this today but I'm unable to solve it completely. I thought I'd document what I found.

The first issue is that the storyContext.getOriginal() method we were relying on before seems to have been removed. Instead there is just a storycontext.originalStoryFn function. Changing that makes the Twig code samples reappear.

But there are two issues with those code samples that weren't present before.

The biggest issue is that many of them are missing arguments. What's perplexing is that when I console.log what the function is doing, it's being run multiple times per story, and many times the outcome of it is correct, but the correct version of the snippet with arguments is always overwritten by a version of the snippet where the arguments are undefined.

The smaller issue we could live with is that the Twig template code is no longer highlighted correctly. It's highlighted as if it were HTML.

I've pushed my branch up with the console.log intact in case anyone else wants to take a swing at fixing this: https://github.com/cloudfour/cloudfour.com-patterns/compare/fix/broken-transform-source

FYI @calebeby @cloudfour/dev