Function parse_fields 

pub fn parse_fields(value: &str) -> Result<HashMap<String, String>, AamlError>

Parses key-value pairs using the AAM pipeline (AAM::parse).

• Inline objects { k = v, ... } are wrapped as _ = { ... } before entering the pipeline, then unwrapped.
• Full documents k = v\n... go through the pipeline directly.

Errors

Returns an error if the value cannot be parsed into key-value pairs.