【Bug】localSearchPlugin breaks up other markdown plugin

[theniceangel]

Describe the bug

When i bump to 1.0.0-alpha.74 and configure the search field，start a server will get a error.
The reason is that my markdown plugin which depends on env parameters that contains path info in markdownToVue.ts

But when I configure the search field in config.ts, in localSearchPlugin.ts which use md.render(await fs.readFile(file, 'utf-8')), It lacks path info in env object as belows:

My plugin is a normal markdown plugin which relies env.path.

export const loadContainerPlugin = (md: MarkdownIt) => {
  md.use(markdownItContainer, 'demo', {
    validate(params) {
      return !!params.trim().match(/^demo/)
    },

    render(tokens: Token[], idx, _, env) {
      // It will breaks when working with localSearchPlugin.ts
      console.log(env.path)
    }
  })
}

Reproduction

none

Expected behavior

localSearchPlugin should keep the same logic as markdownToVue when use md.render()

System Info

none

Additional context

No response

Validations

• Check if you're on the latest VitePress version.
• Follow our Code of Conduct
• Read the docs.
• Check that there isn't already an issue that reports the same bug to avoid creating a duplicate.

[brc-dd]

Feel free to create a PR.

[theniceangel]

Feel free to create a PR.

See this PR