User-facing input type for creating or updating a CF rule.
Mirrors CfRule but dxf-based variants carry a Dxf format
instead of a dxf_id index. Non-dxf variants (ColorScale, DataBar,
IconSet, IconRating) are identical to their CfRule counterparts.
Returns the ordered (Icon, color) pairs for a named Excel icon-set preset,
ordered from lowest to highest value bucket.
name is the XLSX iconSetType attribute value (e.g. "3TrafficLights2").
Returns None for unknown names.