feat(plugin-shiki): add built-in twoslash support

[Mister-Hope]

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[Mister-Hope]

@pengzhanbo It seems that you already implement a good approach in your theme, please consider migrating the feature upstream.

[coveralls]

Pull Request Test Coverage Report for Build 13199274422

Details

• 3 of 7 (42.86%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.07%) to 59.612%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
plugins/markdown/plugin-shiki/src/node/transformers/getTransformers.ts	3	7	42.86%

Totals
Change from base Build 12964973105:	-0.07%
Covered Lines:	1349
Relevant Lines:	2046

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💛 - Coveralls

[pengzhanbo]

I see that the current PR uses renderRich as the rendering solution for twoslash.

In the early stages of my theme, I also used renderRich, but the experience was not user-friendly. It was limited by the code block's overflow: auto setting; if the popup inside the code block was too large and exceeded the width or height of the code block, the popup would be partially obscured, and the code block would display a scrollbar.

I suggest using RenderFloatingVue as the rendering mode, which would provide a much better experience. Of course, this would require introducing more third-party dependencies like floating-vue, mdast-util-from-markdown, mdast-util-gfm, and mdast-util-to-hast.

If twoslash is to be integrated into plugin-shiki, having users manually install these dependencies related to twoslash would raise the barrier to usage. Should we consider making them default installed dependencies? Do you have any solutions regarding this?

[Mister-Hope]

I would prefer optional deps plan, and if the deps are too many, we can consider providing an extra package which has them as deps, so that users can install a single package (e.g.: @vuepress/shiki-twoslash) to achieve