Update pick/weightedPick typings to accept array-like objects

[Bertie690]

Fixes #7257

This PR:

• Fixes a bug

Describe the changes below:

Updated typings of relevant methods to allow passing in array-like objects like TypedArray and readonly arrays. (At runtime, all we require is a numeric length and numeric index support, so array-like objects work just fine here.)

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Note

Medium Risk
TypeScript declaration changes affect public API typings for RandomDataGenerator; while runtime behavior is unchanged, the updated signatures (and the sign() typing/doc change) could impact downstream TS compile behavior and type safety.

Overview
Updates RandomDataGenerator pick and weightedPick to be documented/typed as accepting ArrayLike<T> (e.g., typed arrays/readonly arrays) instead of only T[].

Also adjusts return typing/docs for sign() in JS docs (to -1 | 1) and in types/phaser.d.ts (now sign(): any with an updated @returns), plus a few minor @returns doc formatting tweaks elsewhere in the d.ts file.

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