parse_type extends the parse module (opposite of string.format()) with the following features: * build type converters for common use cases (enum/mapping, choice) * build a type converter with a cardinality constraint (0..1, 0.., 1..) from the type converter with cardinality=1. * compose a type converter from other type converters * an extended parser that supports the CardinalityField naming schema and creates missing type variants (0..1, 0.., 1..) from the primary type converter