Function encode_component 

pub fn encode_component(
    mtype: u8,
    stype: u8,
    version: u8,
    bit_length: u32,
    digest: &[u8],
) -> IsccResult<String>

Encode a raw digest into an ISCC unit string.

Takes integer type identifiers (matching MainType, SubType, Version enum values) and a raw digest, returns a base32-encoded ISCC unit string.

Errors

Returns IsccError::InvalidInput if enum values are out of range, if mtype is MainType::Iscc (5), or if digest.len() < bit_length / 8.