InputOtp keydown bug for integerOnly

[balazsmeszegeto]

Describe the bug

KeyboardEvent.code ignores keyboard layout:

https://developer.mozilla.org/en-US/docs/Web/API/Element/keyup_event#browser_compatibility

In many keyboard layouts, number are on keys, where on English keyboard are not numbers, thus event.code.startsWith('Digit') will return false. This has been issues in sister-repos, ie: primefaces/primereact#6727

Pull Request Link

#17393

Other Reason

No response

Reproducer

https://primeng.org/inputotp

Environment

Keyboard layout with different numbers, for example Hungarian

Angular version

19.0.6

PrimeNG version

v19, v18, v17

Node version

No response

Browser(s)

No response

Steps to reproduce the behavior

Set integerOnly flag to true. Try using numbers on a non-English keyboard layout. Numbers might be prevented

Expected behavior

Should display numbers.