[feat] PDF Text Views

[abose]

Describe the problem

Live preview pdf files and text copy.

Describe the solution you'd like

When opening PDF files, the live view must load the pdf document. Additionally, the text area should show the extracted pdf as text or markdown in read-only mode.

Alternatives considered

No response

Additional context

• https://github.com/mozilla/pdf.js/
• https://www.npmjs.com/package/pdf-text-reader
• https://github.com/modesty/pdf2json