docs(sidebar): support docs/custom/ items and preserve hash anchors

[toreis-up]

This pull request updates the sidebar generation logic in docs/.vitepress/sidebar-gen.ts to support a new category of sidebar items for custom documentation files. The changes ensure that markdown files in docs/custom/ are parsed and can be referenced in the sidebar with a distinct label and icon.

Sidebar generation enhancements:

• Added logic to parse all markdown files in the docs/custom/ directory and include them as ParsedFile objects for sidebar construction.
• Updated the sidebar item matching logic to recognize and handle custom documentation files, returning them as items of type 'custom'.
• Added display support for custom sidebar items, including a new icon (🛠️) and correct linking, alongside existing feature and guide types.

Additional fix:

Fixed sidebar link generation to preserve URL fragments (hash anchors).
Previously, anything after # could be dropped, causing redirects to unintended locations.

[netlify]

✅ Deploy Preview for slidev ready!

Name	Link
🔨 Latest commit	8066fea
🔍 Latest deploy log	https://app.netlify.com/projects/slidev/deploys/698421e2f0785800088472ad
😎 Deploy Preview	https://deploy-preview-2425--slidev.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify project configuration.

[pkg-pr-new]

Open in StackBlitz

@slidev/client

npm i https://pkg.pr.new/slidevjs/slidev/@slidev/client@2425

create-slidev

npm i https://pkg.pr.new/slidevjs/slidev/create-slidev@2425

create-slidev-theme

npm i https://pkg.pr.new/slidevjs/slidev/create-slidev-theme@2425

@slidev/parser

npm i https://pkg.pr.new/slidevjs/slidev/@slidev/parser@2425

@slidev/cli

npm i https://pkg.pr.new/slidevjs/slidev/@slidev/cli@2425

@slidev/types

npm i https://pkg.pr.new/slidevjs/slidev/@slidev/types@2425

commit: 8066fea

[Copilot]

Pull request overview

This pull request enhances the VitePress sidebar generation to support custom documentation files. The implementation adds parsing, matching, and display logic for markdown files in the docs/custom/ directory, allowing them to be referenced in feature page sidebars alongside existing guide and feature references.

Key changes:

• Added parsing for custom documentation files from docs/custom/*.md
• Extended the matching logic to recognize custom file types
• Improved link generation to properly support hash fragments in all reference types

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.