Function extract_package_json_from_str 

pub fn extract_package_json_from_str(
    file: &str,
    content: &str,
    enabled_keywords: &[&'static str],
) -> Vec<ExtractedCommand>

Extract executable scripts from package.json.

Extracts:

• All values in scripts object (these are npm script commands)
• Lifecycle scripts: preinstall, postinstall, prepublish, etc.

Does NOT extract:

• description, keywords, repository fields
• Values in config or other non-executable fields