add_min_line_width# Rules.add_min_line_width(name: str, value: str, layers: list[str] | None = None) → Rules# Append a minimum-line-width rule. Parameters: namestrRule identifier valuestrMinimum width with unit, e.g. "3.5mil". layerslist[str], optionalList of layer names to apply the rule to. If None, applies to all signal layers. Returns: RulesSelf to enable method chaining.