[discussion] Add PDF Viewer & PDF Editor component?

*⚠️ Info: This issue is for product research, to gather community input. In this [base-ui repo](https://github.com/mui/base-ui) we are, currently, focused on the core set of components needed to create a great design system, so the probability we build this in this repo is very low.*

## Summary

## Examples in other libraries

- https://github.com/mozilla/pdf.js
- https://github.com/wojtekmaj/react-pdf
- https://github.com/embedpdf/embed-pdf-viewer
- https://www.react-pdf.dev/
- https://www.syncfusion.com/react-components/react-pdf-viewer
- https://demos.telerik.com/kendo-ui/pdfviewer
- https://www.nutrient.io/sdk/web/
- https://react-pdf-viewer.dev/

*([internal benchmark](https://www.notion.so/mui-org/x-PDF-component-74e68291f1c84bffa2b25f3a118edecd))*

## Motivation

TBD

- User requests:
- /
- UI library requests:
- (on rendering for PDF export, which is different to taking a PDF as input) https://github.com/shadcn-ui/ui/issues/8772
- https://github.com/mui/mui-x/issues/13825