import code from external file is not work

[micooz]

The docs shows Code Hike supports import external code, but it actually not work.

https://codehike.org/docs/concepts/code#importing-code-from-a-file-into-a-codeblock

Reproduce

First create a new project,

npx create-next-app -e https://github.com/code-hike/v1-starter

Then an external file app/external.js,

console.log("Hello, world!")

Then import it from app/page.mdx, use !from syntax:

    ```js
    !from "./external.js"
    ```

You will see an error:

./app/page.mdx
Error: page.mdx:Error: Code Hike couldn't resolve this annotation:
!from /xxx/app/page.mdx 
/xxx/app/"./external.js" doesn't exist.
    at async Promise.all (index 0)

This is because file.history is empty (line 27,32,48), but I don't know why.

codehike/packages/codehike/src/mdx/0.import-code-from-path.ts

Lines 27 to 54 in 7e7b78d

	const mdxPath = file?.history ? file.history[file.history.length - 1] : null
	await Promise.all(
	nodes.map(async (code) => {
	const fromData = code.value.slice(6).trim()
	const [codepath, range] = fromData?.split(/\s+/) || []
	code.value = await readFile(codepath, mdxPath, range)
	}),
	)
	return tree
	}
	async function readFile(
	externalCodePath: string,
	mdxFilePath: string | null,
	range: string | undefined,
	) {
	const annotationContent = "!from " + mdxFilePath + " " + (range || "")
	// if we don't know the path of the mdx file:
	if (mdxFilePath == null) {
	throw new Error(
	`Code Hike couldn't resolve this annotation:
	${annotationContent}
	Someone is calling the mdx compile function without setting the path.
	Open an issue on CodeHike's repo for help.`,
	)
	}