Function select_asset 

pub fn select_asset<'a>(
    assets: &'a [AssetInfo],
    config: &ResolvedConfig,
    platform: &str,
    arch: &str,
) -> Option<&'a AssetInfo>

Select the appropriate asset for the current platform/architecture.

Matching priority:

1. User-defined asset_pattern with placeholder expansion
2. Auto-matching by platform/architecture keywords