Automatic Headings in Sidebar

[Taialt97]

Describe the bug

Setting 'auto' to a sidebar property in config.js does not create automatic sidebar elements.

Reproduction

        sidebar: {
            '/projects/': 'auto',
        }

Expected behavior

A sidebar should be auto generated using the headings provided in the markdown files for the projects page

System Info

vitepress version: 1.0.2
vite version: 1.0.0
Node version: v21.6.1
OS version: Windows 11 Pro 23H2

Additional context

No response

Validations

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

[brc-dd]

Duplicate of #1297

Use the plugins mentioned there instead.