[BUG] Print to pdf

[AlleNeri]

Bug description

In the webview I can't print all the pages, but only the first. I left an example in the Screenshots section.
I guess it's a problem about webview, should I open an issue in webview repository?

Result from CocInfo

## versions

vim version: NVIM v0.9.0
node version: v16.20.0
coc.nvim version: 0.0.82-28e0edd 2022-12-31 20:57:39 +0800
coc.nvim directory: /home/myHome/.local/share/nvim/plugged/coc.nvim
term: xterm-256color
platform: linux

Steps to reproduce

• Start nvim.
• execute :CocCommand markdown-preview-enhanced.openPreview; in my case it will open a firefox tab.
• click on sandwich menu in the header.
• click on Print.

Expected behavior

This Print button should allow me to print the whole document.

Screenshots

[weirongxu]

As far as I know. I'm afraid this problem is difficult to fix, you may need to use prince/ebook instead of this function.

This is a right-click menu.

[AlleNeri]

you may need to use prince/ebook instead of this function.

The 'eBook > PDF' returns the error: [coc.nvim] Error: spawn ebook-convert ENOENT.
The 'PDF (prince)' returns the error: [coc.nvim] "princexml" is required to be installed.
Could you help me to solve them?

[weirongxu]

This requires you to install an external program.

https://www.princexml.com/doc-install/
https://manual.calibre-ebook.com/generated/en/ebook-convert.html