build: update scaffolding for creating unary math strided packages

[gunjjoshi]

Description

What is the purpose of this pull request?

This pull request:

• updates scaffold.sh and adds other required files, i.e., runner.js, generate_data.js and data.json in _tools/scaffold/math-strided-real-typed-unary.

Related Issues

Does this pull request have any related issues?

This pull request:

• resolves a part of #1147.

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.

• [x] Read, understood, and followed the contributing guidelines.

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@stdlib-js/reviewers