Support separate transliteration rules for different types of entity

[ribose-jeffreylau]

Allow separate transliteration rules for different types of entity, e.g. title case for spans marked as GeoNames, hyphenate syllables within Person Names, etc.

Originally: https://github.com/interscript/lcs/issues/2#issuecomment-578096993

[ronaldtse]

Requires implementation of #709