fix(upload-client/UploadcareGroup): rewrite group cdnUrl base domain with specified one

[nd0ut]

Description

Checklist

• Tests (if applicable)
• Documentation (if applicable)
• Changelog stub (or use conventional commit messages)

[Copilot]

Pull request overview

This PR adds functionality to rewrite the CDN base domain for UploadcareGroup objects, allowing users to specify a custom CDN domain that replaces the default ucarecdn.com domain in group URLs.

Changes:

• Introduces a new replaceUrlBase utility function to swap protocol, hostname, and port while preserving path, query, and hash components
• Updates UploadcareGroup to use replaceUrlBase for rewriting the group's cdnUrl with the specified baseCDN
• Adds comprehensive test coverage for both the new utility function and the updated UploadcareGroup behavior

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
packages/upload-client/src/tools/replaceUrlBase.ts	New utility function that replaces the base URL (protocol, hostname, port) while preserving path and query parameters
packages/upload-client/src/tools/UploadcareGroup.ts	Updated to use replaceUrlBase for rewriting the group's CDN URL with custom base domain
packages/upload-client/test/tools/replaceUrlBase.test.ts	Test suite for the replaceUrlBase utility covering various URL transformation scenarios
packages/upload-client/test/tools/UploadcareGroup.test.ts	Tests verifying that UploadcareGroup correctly applies custom CDN domains to group and file URLs
packages/upload-client/test/tools/UploadcareFile.test.ts	Tests for UploadcareFile demonstrating CDN URL customization and file metadata handling

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.