Function isValidConfidence

isValidConfidence(confidence: number): boolean
Validates that a confidence value is within the valid range (0.0 to 1.0)
Parameters
- confidence: number
  Confidence value to validate
Returns boolean
True if the confidence is valid
Example
```
isValidConfidence(0.95); // true
isValidConfidence(1.0); // true
isValidConfidence(1.5); // false
```
- Defined in utils.ts:241