Function unsignedDecimalNumber

unsignedDecimalNumber(val: number): number
Validates and converts a number to a positive integer (unsigned decimal number).

Reference: ST_UnsignedDecimalNumber in OOXML specification
Parameters
- val: number
  The number to validate and convert
Returns number
The floored positive integer value
Throws
Error if the value is NaN or negative
Example
```
const num = unsignedDecimalNumber(10.7); // Returns 10
const invalid = unsignedDecimalNumber(-5); // Throws Error
```
- Defined in util/values.ts:121