[Feature]: Automatically analyze code block language to generate highlight configuration

[Timeless0911]

What problem does this feature solve?

see details in #419

We can automatically analyze code block language to generate highlight configuration.

What does the proposed API look like?

none

[shulaoda]

I will try to implement this feature.

[shulaoda]

I need some discussion. @Timeless0911
If I use the compile of mdxRs in the loader to obtain the code language used on the page, I can directly import the corresponding highlight method, which is faster but not suitable for disabledMdxRs.
Another way is to scan all the MD files before the compilation of Rspack and extract the code languages, but this means it consumes more performance, which requires providing a parameter called auto on the highlighter for users to choose. Is a certain performance loss necessary for such a feature?

[Timeless0911]

just consider mdxrs scene, it should be option-in and we can specify limitations in doc.

[shulaoda]

just consider mdxrs scene, it should be option-in and we can specify limitations in doc.

How about automatically recognizing highlight languages in mdxRs mode, and the highlighter option only serves as an alias?

[Timeless0911]

just consider mdxrs scene, it should be option-in and we can specify limitations in doc.

How about automatically recognizing highlight languages in mdxRs mode, and the highlighter option only serves as an alias?

LGTM