feat: add stats/base/ndarray/nanmax-by

[DivyanshuVortex]

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
Resolves None.

Description
What is the purpose of this pull request?

This pull request:

feat: add stats/base/ndarray/nanmax-by

Resolves None .

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[stdlib-bot]

Coverage Report

Package	Statements	Branches	Functions	Lines
stats/base/ndarray/nanmax-by	$\color{green}123/123$ $color{green}+100.00%$	$\color{green}4/4$ $color{green}+100.00%$	$\color{green}2/2$ $color{green}+100.00%$	$\color{green}123/123$ $color{green}+100.00%$

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

[kgryte]

Main comments which need to be resolved concern benchmark and example value generation, along with a minor docs change. Otherwise, this PR is shaping up.

[kgryte]

Left another review. The only remaining thing which needs clean-up are the TypeScript declarations.

[kgryte]

LGTM