feat: update ndarray TypeScript declarations

[stdlib-bot]

This PR updates TypeScript declarations for the @stdlib/ndarray namespace.

Reviewer Checklist

• Check the scope of the changes (following Conventional Commits):
  • Are these new APIs? Then this is a feat.
  • Are these changes to existing APIs that could break compatibility? Then this is a feat! (i.e., a breaking change).
  • Are these only documentation changes to existing APIs? Then this is docs.
• Update the PR title to align with the change type (feat, feat!, or docs).
• Approve the PR once you are confident about the classification and changes made.

[stdlib-bot]

Coverage Report

Package	Statements	Branches	Functions	Lines
ndarray	$\color{green}708/708$ $\color{green}+100.00\%$	$\color{green}1/1$ $\color{green}+100.00\%$	$\color{green}0/0$ $\color{green}+100.00\%$	$\color{green}708/708$ $\color{green}+100.00\%$

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

[kgryte]

@Planeshifter Should we wait for the namespace reserved keyword workaround before moving this PR forward?

[Planeshifter]

Blocking until we have updated the generation script to not use reserved keywords.