feat: add ndarray/fill-slice

[headlessNode]

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type: pre_commit_static_analysis_report
description: Results of running static analysis checks when committing changes. report:

• task: lint_filenames status: passed
• task: lint_editorconfig status: passed
• task: lint_markdown status: passed
• task: lint_package_json status: passed
• task: lint_repl_help status: passed
• task: lint_javascript_src status: passed
• task: lint_javascript_cli status: na
• task: lint_javascript_examples status: passed
• task: lint_javascript_tests status: passed
• task: lint_javascript_benchmarks status: passed
• task: lint_python status: na
• task: lint_r status: na
• task: lint_c_src status: na
• task: lint_c_examples status: na
• task: lint_c_benchmarks status: na
• task: lint_c_tests_fixtures status: na
• task: lint_shell status: na
• task: lint_typescript_declarations status: passed
• task: lint_typescript_tests status: passed
• task: lint_license_headers status: passed ---

Progresses #2656.

Description

What is the purpose of this pull request?

This pull request:

• add ndarray/fill-slice

Related Issues

Does this pull request have any related issues?

This pull request:

• progresses [RFC]: achieve ndarray API parity with built-in JavaScript arrays  #2656

Questions

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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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@stdlib-js/reviewers

[stdlib-bot]

Coverage Report

Package	Statements	Branches	Functions	Lines
ndarray/fill-slice	$\color{green}212/212$ $\color{green}+100.00\%$	$\color{green}27/27$ $\color{green}+100.00\%$	$\color{green}1/1$ $\color{green}+100.00\%$	$\color{green}212/212$ $\color{green}+100.00\%$

The above coverage report was generated for the changes in this PR.

[kgryte]

@headlessNode I updated the README with what I think to be the more desirable API. This makes the API much more similar to slice-assign and ensures that we can enforce strict bounds checking. If you wouldn't mind updating the implementation, docs, examples, benchmarks, and tests accordingly, that would be appreciated. For the argument juggling logic, slice-assign provides a decent precedent.

[headlessNode]

@kgryte Need suggestion on how to solve the lint error in index.d.ts. FYI, slice-assign does the same thing and the same error is highlighted in the editor.

[kgryte]

LGTM after clean-up.