Twoslash code highlighter breaks when rendering hover that has a js code block in it. #403
Description
Consider console.log(). Its docs look like this (notice the code fence inside the docblock):
/**
* Prints to `stdout` with newline. Multiple arguments can be passed, with the
* first used as the primary message and all additional used as substitution
* values similar to [`printf(3)`](http://man7.org/linux/man-pages/man3/printf.3.html)
* (the arguments are all passed to [`util.format()`](https://nodejs.org/docs/latest-v22.x/api/util.html#utilformatformat-args)).
*
* ```js
* const count = 5;
* console.log('count: %d', count);
* // Prints: count: 5, to stdout
* console.log('count:', count);
* // Prints: count: 5, to stdout
* ```
*
* See [`util.format()`](https://nodejs.org/docs/latest-v22.x/api/util.html#utilformatformat-args) for more information.
* @since v0.1.100
*/When Twoslash goes to render a codeblock with console.log() in it, it tries to recursively render the js code fence inside the docs for console.log(). When it does so, we get this:
./content/docs/upgrade-guide.mdx
Error evaluating Node.js code
ShikiError: upgrade-guide.mdx:ShikiError: Language `js` not found, you may need to load it first
[at Object.getLanguage (file:///home/sol/src/kit/docs/node_modules/.pnpm/@shikijs+core@3.3.0/node_modules/@shikijs/core/dist/index.mjs:1756:13)]
[at codeToTokensBase (file:///home/sol/src/kit/docs/node_modules/.pnpm/@shikijs+core@3.3.0/node_modules/@shikijs/core/dist/index.mjs:809:29)]
[at file:///home/sol/src/kit/docs/node_modules/.pnpm/@shikijs+core@3.3.0/node_modules/@shikijs/core/dist/index.mjs:1015:21]
[at <anonymous>]
[at codeToTokensWithThemes (file:///home/sol/src/kit/docs/node_modules/.pnpm/@shikijs+core@3.3.0/node_modules/@shikijs/core/dist/index.mjs:1014:31)]
[at codeToTokens (file:///home/sol/src/kit/docs/node_modules/.pnpm/@shikijs+core@3.3.0/node_modules/@shikijs/core/dist/index.mjs:1109:25)]
[at codeToHast (file:///home/sol/src/kit/docs/node_modules/.pnpm/@shikijs+core@3.3.0/node_modules/@shikijs/core/dist/index.mjs:1168:7)]
[at Object.codeToHast (file:///home/sol/src/kit/docs/node_modules/.pnpm/@shikijs+core@3.3.0/node_modules/@shikijs/core/dist/index.mjs:1155:36)]
[at code (file:///home/sol/src/kit/docs/node_modules/.pnpm/fumadocs-twoslash@3.1.1_@types+react-dom@19.0.4_@types+react@19.0.12__@types+react@19.0_9e9244c803143d69682599df624dac14/node_modules/fumadocs-twoslash/dist/index.js:118:23)]
[at Object.one (file:///home/sol/src/kit/docs/node_modules/.pnpm/mdast-util-to-hast@13.2.0/node_modules/mdast-util-to-hast/lib/state.js:254:14)]
Related: fuma-nama/fumadocs#1095 (comment)