Function parse_predefined_cmap_name 

pub fn parse_predefined_cmap_name(name: &str) -> Option<PredefinedCMapInfo>

Parse a predefined CMap name and extract its information.

Recognizes standard Adobe CJK CMap names:

• Identity-H / Identity-V
• Adobe-Japan1-* (with -H or -V suffix for writing mode)
• Adobe-GB1-*
• Adobe-CNS1-*
• Adobe-Korea1-*
• Standard encoding names like UniJIS-UTF16-H, UniGB-UTF16-H, etc.