feat: add ml/base/kmeans/results/*

[nakul-krishnakumar]

Resolves None.

Description

What is the purpose of this pull request?

This pull request:

• Adds ml/base/kmeans/results/factory.
• Adds ml/base/kmeans/results/float64.
• Adds ml/base/kmeans/results/float32.
• Adds ml/base/kmeans/results/to-string.
• Adds ml/base/kmeans/results/to-json.

Related Issues

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This pull request has the following related issues:

• None.

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.

AI Assistance

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

• Yes
• No

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• 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.".

None.

---

@stdlib-js/reviewers

[nakul-krishnakumar]

Suggested change

	function toJSON( results ) {
	return {
	'replicates': results.replicates,
	'replicate': results.replicate,
	'metric': results.metric,
	'iterations': results.iterations,
	'algorithm': results.algorithm,
	'inertia': results.inertia,
	'k': results.k,
	'samples': results.samples,
	'features': results.features,
	'method': results.method
	};
	}
	function toJSON( results ) {
	return {
	'replicates': Number( results.replicates ),
	'replicate': Number( results.replicate ),
	'metric': results.metric,
	'iterations': Number( results.iterations ),
	'algorithm': results.algorithm,
	'inertia': results.inertia,
	'k': Number( results.k ),
	'samples': Number( results.samples ),
	'features': Number( results.features ),
	'method': results.method
	};
	}

Is this required? This can fix the failing test cases.