Function bigIntMod

bigIntMod(n: bigint, m: bigint): bigint
Computes the true mathematical modulo of two bigint values, ensuring a non-negative result.
Parameters
- n: bigint
  The bigint dividend.
- m: bigint
  The bigint divisor.
Returns bigint
The positive bigint remainder representing n mod m.
Remarks
Similar to mod, this function implements correct mathematical modulo for large bigints so that any negative dividend n resolves into a positive remainder modulo m.
Example
```
bigIntMod(BigInt(-5), BigInt(3)); // returns 1n
```
- Defined in src/helpers.ts:154