[iOS] Fix wrong pointerType in Hover gesture

[m-bert]

Description

Hover gesture events contain wrong pointer type. Normally, we map UITouchTypePencil to RNGestureHandlerStylus, but Hover used unmapped UITouchTypePencil instead.

Because those enums map to different values (UITouchTypePencil = 2 & RNGestureHandlerStylus = 1), it caused wrong pointer type to be returned.

Fixes #3977

Test plan

Not yet as now I don't have access to iPad 😞

[Copilot]

Pull request overview

This pull request fixes an incorrect pointer type mapping in the iOS Hover gesture handler. The handler was using the raw UIKit enum value UITouchTypePencil instead of the properly mapped gesture handler enum value RNGestureHandlerStylus, causing incorrect pointer type values to be reported in hover gesture events.

Changes:

• Fixed pointer type mapping in eventExtraData method to use RNGestureHandlerStylus instead of UITouchTypePencil

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