feat: improve print style

[Mister-Hope]

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[Mister-Hope]

Before:

After:

[meteorlxy]

I think we should put all print-related styles together in a same file or in a same section of their corresponding style file.

What about just adding a print.scss file in default theme? This might be more related to theme than those plugins.

[Mister-Hope]

I think we should put all print-related styles together in a same file or in a same section of their corresponding style file.

What about just adding a print.scss file in default theme? This might be more related to theme than those plugins.

I do think that some styles are much more reasonable inside a plugin, e.g.: in all cases users shall not print a "search box"😂 so does a back-to-top plugin and a pwa pop up.

Moreover, since users are printing pdf, all links are "external"

So my central point is it's totally reasonable for the plugin print style to be like that all times.

If users do in rare case disagree with them, they shall override them

[Mister-Hope]

Also a toggleDarkmode button should also be hidden under all situations, and so does a edit link towards a pdf.

In my own theme I did plenty of customization for print style, but for the modification in this pr, I do think they are necessary in 99% situations. So I think adding them inside styles controlling the component would be fine.

The only exception should be anchor links, as heading anchor (the # before heading are hidden, and links are inserted through after)