/forge-type — Regenerate Type Scale

Recompute the type scale:

Given base (e.g., 16px) and ratio (e.g., 1.250):

• xs: base / ratio² (rounded)
• sm: base / ratio
• base: base
• md: base × ratio
• lg: base × ratio²
• xl: base × ratio³
• 2xl: base × ratio⁴
• 3xl: base × ratio⁵

Output: CSS custom properties and suggested usage per step.