The rebase onto main resolved the theme.rs and system_fonts.rs conflicts
in favour of the new Hangul code and deleted upstream's Telugu fallback
(SYSTEM_TELUGU_FALLBACK, telugu_fallback, telugu_candidates,
script_fallback and their tests), while tests/fonts.rs kept the Telugu
tests, so the build failed. Keep both: Telugu restored as it is on main,
Hangul added alongside it through the same script_fallback helper.