Add clampToMax function

[aleclarson]

One of the few Radashi functions that should handle undefined inputs. The main use case for this function is when working with a configurable quantity that has an upper bound. For example, a request handler that queries a database might accept a limit option that cannot exceed 100.

export function clampToMax(value: number | undefined, max: number) {
  return value !== undefined && value > 0 ? Math.min(value, max) : max
}

Notably, when the value is undefined or ≤ 0, the max value is used. This is a maintenance improvement over the following "native" approach:

const max = 100
Math.min(value ?? max, max)

Alternative naming: upperBound