Fix relocation exclusion for file patterns like kotlin/kotlin.kotlin_builtins

[Goooler]

• Closes Relocation Duplicates kotlin.kotlin_builtins #295.
• Closes Exclude in relocations disregarded for kotlin_builtins #562.
• Closes [Question] How to avoid string in classes being relocated #884.

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• CHANGELOG's "Unreleased" section has been updated, if applicable.

[gemini-code-assist]

Code Review

The pull request introduces a new test case preserveKotlinBuiltins to verify that Kotlin built-in files are correctly preserved during relocation. The test creates a Kotlin JAR, adds a Kotlin built-ins file, and then uses the shadowJar task to relocate the Kotlin package while excluding the built-ins file. The test then asserts that the built-ins file is present in the output JAR and not relocated. Overall, the test seems well-structured and addresses the intended functionality.

Merge Readiness

The code changes introduce a new test case that enhances the project's testing suite. Given the absence of any identified critical or high severity issues, the pull request appears to be in good shape. I am unable to directly approve the pull request, and recommend that others review and approve this code before merging. However, I believe it is ready for merging once any minor feedback is addressed.

PR Overview

This PR updates the changelog to document a fix for the relocation exclusion for file patterns like "kotlin/kotlin.kotlin_builtins".

• Clarifies the fixed issue in the changelog.
• Adds a new "Fixed" section detailing the change.

Reviewed Changes

File	Description
docs/changes/README.md	Added a changelog entry for the fix.

Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.