Improve Korean typesetting

[eupthere]

Addresses Issue #1376

Changes

Added Korean line spacing settings for improved readability

Added word-break: keep-all to prevent awkward Korean line breaks

Latin text has natural break points at spaces, and browsers preserve alphabetic words by default. Korean text, under default East Asian line-breaking rules, may allow breaks between syllable blocks. word-break: keep-all tells the browser to avoid those intra-word CJK breaks and keep Korean word groups together, more like Latin words.

[Nwakaego-Ego]

Hi @eupthere, thank you for this PR. I tested it locally on the tutorial and example pages and can confirm that the line spacing was applied correctly.
cc @doradocodes @ksen0

[ksen0]

Thanks @Nwakaego-Ego @eupthere ! If one of you makes the matchign 2.0 PR I'm happy to merge also