Function percentAboveThreshold

percentAboveThreshold(
    quality: string,
    threshold: number,
    encoding?: QualityEncoding,
): number
Find the percentage of bases above a quality threshold

Useful for quality control metrics like Q20 or Q30 percentages.
Parameters
- quality: string
  ASCII quality string
- threshold: number
  Minimum quality score
- encoding: QualityEncoding = "phred33"
  Quality encoding scheme
Returns number
Percentage of bases above threshold (0-100)
Example
```
const q30Percent = percentAboveThreshold('IIIIIGGGGFFFFF', 30, 'phred33');
console.log(`Q30: ${q30Percent.toFixed(1)}%`); // Percentage of Q30+ bases
```
- Defined in src/operations/core/quality/statistics.ts:199