[Feature Request]Add page-specific fragment identifiers

[HirokiNakatani]

Describe the solution you'd like

If the source is a PDF, add a fragment identifier specifying the page

Why the solution needed

This is because with PDFs containing large pages, such as manuals, you can instantly jump to the reference page, which increases convenience.

Additional context

Implementation feasibility

Are you willing to collaborate with us to discuss the solution, decide on the approach, and assist with the implementation?

• Yes, I am able to implement the feature and create a pull request.
• No, I am unable to implement the feature, but I am open to discussing the solution.

[statefb]

Duplicate: #780