fix: add placeholder file to satisfy ESLint CI

[SuYaSh-PaThAk04]

Resolves #8140 .

Description

What is the purpose of this pull request?
Fixing JS linting issue.

This pull request:

Summary

The ESLint GitHub Actions workflow was failing because it expected at least one .js file at the repository root.
Since the file no longer exists, CI could not pass.

This PR adds a placeholder file beep.js containing only a comment to satisfy ESLint and unblock CI.

Related Issues

Does this pull request have any related issues?

This pull request:

• resolves Fix JavaScript lint errors #8140

Questions

Any questions for reviewers of this pull request?

This is an interim workaround.

Proper solution: update ESLint workflow configuration to avoid depending on placeholder files.

Once configs are updated, beep.js should be safely deleted.

Other

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

No additional information

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

[kgryte]

@SuYaSh-PaThAk04 Thank you for your interest in stdlib; however, this fix is not what is desired, as we are not interested in creating extraneous files at the root project level in order to satisfy linting.

Thanks again for your interest, and we look forward to your future contributions.