To create a new top-level navigation item in the documentation, follow these steps:

1. Create a New Folder: Inside the docs/ directory, create a new folder with a name that represents your new section. For example, if your new section is named "New Section Name," create a folder named new-section-name.

2. Add Content: Within the newly created folder, add an index.md file. This Markdown file will contain the content for your new section.

3. Make it visible inside of sidebar: Open docs/.vitepress/config.js in your code editor, locate the themeConfig.sidebar object. Add a new item to this object with the following format:

   themeConfig: {
     // ...
     sidebar: [
       // existing sidebar items
       {
         text: 'New Section Name',
         link: '/new-section-name/',
       },
       // existing sidebar items
     ]
     // ...
   }

4. Update the Table of Contents: Open docs/index.md, which is the main documentation file. Update the table of contents to include a link to your new section.

To create nested navigation in the documentation sidebar you should have the next structure inside of themeConfig.sidebar (docs/.vitepress/config.js):

themeConfig: {
  // ...
  sidebar: [
    // existing sidebar items
    
      {
        text: 'New Section Name',
        items: [
          { text: 'New Subsection 1', link: '/subsection-1' },
          { text: 'New Subsection 2', link: '/subsection-2' },
        ]
      },
    // existing sidebar items
  ]
  // ...
}

For more docs, please visit vitepress.dev