Investigate replacing react-syntax-highlighter with shiki

[JReinhold]

react-syntax-hightlighter (and it's subdependencies) takes up a significant amount of the @storybook/core/components bundle:

https://635781f3500dd2c49e189caf-rjflqvpgls.chromatic.com/?path=/story/bench--es-build-analyzer&args=metafile:core_SLASH_components_DOT_esm_DOT_json

We should investigate if this can be optimized by moving to Shiki for syntax highlighting. On the surface Shiki doesn't look like a smaller package overall (pkg-size), but it offers fine-grained control of the bundling that might suit our needs.

Shiki also has other advantages in terms of language, perforamcne, theming and API support.