feat!: migrate `utils/capitalize-keys` to `object/capitalize-keys`

[Neerajpathak07]

Progresses #8755.

Description

What is the purpose of this pull request?

This pull request:

• Migrates utils/capitalize-keys to object/capitalize-keys

Related Issues

Does this pull request have any related issues?

This pull request has the following related issues:

• #8755

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

AI Assistance

When authoring the changes proposed in this PR, did you use any kind of AI assistance?

• [ ] Yes
• [x] No

If you answered "yes" above, how did you use AI assistance?

• [ ] Code generation (e.g., when writing an implementation or fixing a bug)
• [ ] Test/benchmark generation
• [ ] Documentation (including examples)
• [ ] Research and understanding

Disclosure

If you answered "yes" to using AI assistance, please provide a short disclosure indicating how you used AI assistance. This helps reviewers determine how much scrutiny to apply when reviewing your contribution. Example disclosures: "This PR was written primarily by Claude Code." or "I consulted ChatGPT to understand the codebase, but the proposed changes were fully authored manually by myself.".

{{TODO: add disclosure if applicable}}

---

@stdlib-js/reviewers

[stdlib-bot]

Coverage Report

Package	Statements	Branches	Functions	Lines
namespace/alias2pkg	$\color{green}95/95$ $\color{green}+100.00%$	$\color{green}7/7$ $\color{green}+100.00%$	$\color{green}1/1$ $\color{green}+100.00%$	$\color{green}95/95$ $\color{green}+100.00%$
namespace	$\color{red}39324/39427$ $\color{green}+99.74%$	$\color{green}112/112$ $\color{green}+100.00%$	$\color{red}2/11$ $\color{green}+18.18%$	$\color{red}39324/39427$ $\color{green}+99.74%$
namespace/pkg2alias	$\color{green}100/100$ $\color{green}+100.00%$	$\color{green}10/10$ $\color{green}+100.00%$	$\color{green}1/1$ $\color{green}+100.00%$	$\color{green}100/100$ $\color{green}+100.00%$
namespace/pkg2related	$\color{green}100/100$ $\color{green}+100.00%$	$\color{green}10/10$ $\color{green}+100.00%$	$\color{green}1/1$ $\color{green}+100.00%$	$\color{green}100/100$ $\color{green}+100.00%$
namespace/pkg2standalone	$\color{green}95/95$ $\color{green}+100.00%$	$\color{green}7/7$ $\color{green}+100.00%$	$\color{green}1/1$ $\color{green}+100.00%$	$\color{green}95/95$ $\color{green}+100.00%$
namespace/standalone2pkg	$\color{green}95/95$ $\color{green}+100.00%$	$\color{green}7/7$ $\color{green}+100.00%$	$\color{green}1/1$ $\color{green}+100.00%$	$\color{green}95/95$ $\color{green}+100.00%$
object/capitalize-keys	$\color{green}114/114$ $\color{green}+100.00%$	$\color{green}11/11$ $\color{green}+100.00%$	$\color{green}1/1$ $\color{green}+100.00%$	$\color{green}114/114$ $\color{green}+100.00%$
utils	$\color{red}45355/61575$ $\color{green}+73.66%$	$\color{red}757/801$ $\color{green}+94.51%$	$\color{red}23/508$ $\color{green}+4.53%$	$\color{red}45355/61575$ $\color{green}+73.66%$
utils/uncapitalize-keys	$\color{green}114/114$ $\color{green}+100.00%$	$\color{green}11/11$ $\color{green}+100.00%$	$\color{green}1/1$ $\color{green}+100.00%$	$\color{green}114/114$ $\color{green}+100.00%$
utils/uppercase-keys	$\color{green}108/108$ $\color{green}+100.00%$	$\color{green}9/9$ $\color{green}+100.00%$	$\color{green}1/1$ $\color{green}+100.00%$	$\color{green}108/108$ $\color{green}+100.00%$

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

[Neerajpathak07]

eslint is expected to throw an error for typescript declarations as such I'll go ahead and mark this ready for review.

[kgryte]

As the CI failure is expected (at least for now; hopefully this is addressed soon(ish)), I'll go ahead and merge.