Function constrain

constrain(n: number, low: number, high: number): number
Constrains a given number n between a specified minimum (low) and maximum (high) value.

If n is less than low, the function returns low. If n is greater than high, the function returns high. Otherwise, it returns n unchanged.
Parameters
- n: number
  The number to constrain.
- low: number
  The minimum allowable value.
- high: number
  The maximum allowable value.
Returns number
The constrained value of n, which will be in the range [low, high].
Example
```
const constrained1 = constrain(5, 1, 10);  // Returns 5 (within range)
const constrained2 = constrain(-5, 1, 10); // Returns 1 (below range)
const constrained3 = constrain(15, 1, 10); // Returns 10 (above range)
```
- Defined in src/utils/constrain.ts:20