Function resolve_module 

pub fn resolve_module(
    module_repo: &impl DomainModuleRepository,
    _ito_path: &Path,
    input: &str,
) -> CoreResult<Option<ResolvedModule>>

Resolve a module directory name from user input.

Input can be a full directory name (NNN_slug) or the numeric module id (NNN). Empty input returns Ok(None).