[feature request] add chinese language support for builder?

[dabuside]

[shoko]

I create a pr for this, please take a look and give some advice.

[Xitang Zhao]

Hi there, thanks for creating this issue. React PDF would only display the font correctly if the corresponding font family is registered for it to use. Previously, Chinese font wasn't added and registered, hence the PDF output was garbled code.

I just merged #40 and this PR adds the 思源黑体 (简体) font. If user has zh language in their browser's navigator.languages property, user would see 思源黑体 (简体) listed as one of the font option in the font family section
https://user-images.githubusercontent.com/23644661/257455861-174687a1-808c-4e74-8c86-23819c949ab3.gif

More context can be found in this thread: #36 (comment)