fix/improve localhost detection

[forgetso]

• Improve localhost detection
• lint-fix
• docs(changeset): Improve localhost detection

[Copilot]

Pull request overview

This PR updates @prosopo/util URL utilities to better recognize localhost-like domains (including ports/subdomains/IPv6) and adds a changeset for a patch release.

Changes:

• Expand domainIsLocalhost to normalize case, strip ports, and recognize additional localhost variants (e.g., *.localhost, IPv6 loopback).
• Add JSDoc for validateDomainPattern.
• Add a changeset describing the improvement.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
packages/util/src/url.ts	Updates localhost detection logic and adds documentation for domain pattern validation.
.changeset/tough-plants-happen.md	Declares a patch release for @prosopo/util noting improved localhost detection.

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