Update pick/weightedPick typings to accept array-like objects

[Bertie690]

Fixes #7257

This PR:

• Fixes a bug

Describe the changes below:

Updated typigs of relevant methods to allow passing in array-like objects like TypedArray and readonly arrays.

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Note

Low Risk
Low risk: this is a JSDoc/typing-only update (no runtime logic changes) that broadens accepted parameter types for pick/weightedPick and refines the sign return type annotation.

Overview
Updates Phaser.Math.RandomDataGenerator JSDoc generics so pick and weightedPick accept ArrayLike<T> (e.g., typed arrays / readonly arrays) instead of only T[].

Refines the sign JSDoc return type from number to the literal union -1 | 1 for more accurate typings.

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