docs: update examples for random/array/tools

[jenish-thapa]

Resolves #1605

Description

What is the purpose of this pull request?

This pull request:

• Adds detailed examples for each function in the @stdlib/random/array/tools namespace to improve the README documentation.
• Provides usage examples for binaryFactory, binary, nullary, ternaryFactory, ternary, unaryFactory, and unary methods.
• Updates the README.md file to showcase practical usage scenarios for creating arrays with pseudorandom number generators (PRNGs).

Related Issues

Does this pull request have any related issues?

This pull request:

• Resolves [RFC]: improve README examples of random/array/tools namespace #1605

Questions

Any questions for reviewers of this pull request?

No

Other

Any other information relevant to this pull request? This may include screenshots, references, and/or implementation notes.

No.

Checklist

Please ensure the following tasks are completed before submitting this pull request.

• Read, understood, and followed the contributing guidelines.

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@stdlib-js/reviewers

[stdlib-bot]

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[jenish-thapa]

I made sure to format and clarify each section for consistency and readability. Let me know if there’s anything else you’d like to adjust!