Function isLibcantusError

isLibcantusError(
value: unknown,
): value is InvalidInputError | NoSolutionError | BudgetExceededError
Whether a caught value is one of this library's coded errors.
Parameters
- value: unknown
  The caught value.
Returns value is InvalidInputError | NoSolutionError | BudgetExceededError
True when it carries a LibcantusErrorCode.
Example
```
import { isLibcantusError, voiceChord, parseChordSymbol } from '@libraz/libcantus';
try {
  voiceChord(parseChordSymbol('C'), { ranges: [] });
} catch (error) {
  if (isLibcantusError(error) && error.code === 'NO_SOLUTION') {
    // loosen the constraints rather than blaming the input
  }
}
```
- Defined in src/core/errors/index.ts:153