No sane way to do linebreak in source file in CJK context

[AprilGrimoire]

Description

In Typst, currently a newline is treated as whitespace no matter what language environment it's in. However, this becomes very problematic in CJK.

In space-separated languages, when a line becomes too long, the user can replace any space by a newline and get the same output. However in CJK, there are no natural newlines in paragraphs, making it impossible to insert a non-semantic newline in the source file.

Reproduction URL

https://typst.app/project/rfrFvIYflkQ7FI5W7Lykpu

Operating system

Linux

Typst version

• I am using the latest version of Typst

[AprilGrimoire]

There is a package for this: https://typst.app/universe/package/cjk-unbreak/

[isuffix]

Duplicate of #792, currently being worked on in #7350 :)