Function parse_macbinary 

pub fn parse_macbinary(data: &[u8]) -> Option<ImportedResourceFork>

Parse a MacBinary (II/III) file and extract both forks and Finder info.

MacBinary header (128 bytes):

• [0] must be 0
• [1] filename length (1-63)
• [65..69] type code
• [69..73] creator code
• [83..87] data fork length (u32 BE)
• [87..91] resource fork length (u32 BE)
• [122] MacBinary version (129=II, 130=III)
• [124..126] CRC-16 of bytes 0-123 (MacBinary II+)

Returns None if the file doesn’t look like a valid MacBinary container.