Function parse_args 

pub fn parse_args(
    args: &[String],
    arg_specs: &[CliArgSpec],
) -> Result<HashMap<String, String>, ModuleError>

Parse CLI args into a map keyed by param name.

Supports:

• --long_name value and -short value
• --flag (bool, no value) → param = “true”
• Positional fallback: if no - prefix, treat as positional by arg order