docs: improve README examples of math/iter/sequences

[ShivamAhir]

Resolves # .

Description

What is the purpose of this pull request is to add example in math/iter/sequences

This pull request:

• Add examples of the functions present in math/iter/sequences namespace
• adds example demonstration using iterSquaresSeq functions in the README.
• Adds the same demonstration example in examples/index.js
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Related Issues

resolve improve README examples of math/iter/sequences namespace #1577

This pull request:

• resolves #
• fixes #

Questions

Any questions for reviewers of this pull request?

No.

Other

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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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PR Commit Message

docs: improve README examples of `math/iter/sequences`

PR-URL: https://github.com/stdlib-js/stdlib/pull/1779
Ref: https://github.com/stdlib-js/stdlib/issues/1577

Co-authored-by: Philipp Burckhardt <[email protected]>
Co-authored-by: shivam Ahir <[email protected]>
Reviewed-by: Philipp Burckhardt <[email protected]>

Please review the above commit message and make any necessary adjustments.