Handle inverse scaling (min > max) in generator#1

If a user provides a minSize that is larger than maxSize, the generated clamp() function might behave unexpectedly. We should detect this case and either:

1. Swap the values automatically.
2. Throw a validation error (if we want to be strict).
3. Explicitly support inverse scaling if that is a valid design pattern (e.g., shrinking text on larger screens?).