feat: add ndarray/base/trues-like

[Planeshifter]

Resolves stdlib-js/todo#2777.

Description

What is the purpose of this pull request?

This pull request:

• adds the @stdlib/ndarray/base/trues-like package, which creates an ndarray filled with true values and having the same shape and data type as a provided input ndarray
• registers truesLike in the @stdlib/ndarray/base namespace

The implementation follows the same pattern as @stdlib/ndarray/base/falses-like:

function truesLike( x ) {
    return fill( emptyLike( x ), true );
}

Supported dtypes: bool and generic (same as @stdlib/ndarray/base/trues and @stdlib/ndarray/base/falses-like).

Related Issues

Does this pull request have any related issues?

This pull request has the following related issues:

• stdlib-js/todo#2777

Questions

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No.

Other

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No.

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• Read, understood, and followed the contributing guidelines.

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This PR was written primarily by Claude Code.

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