Improve changelog generation to credit multiple contributors

[ondrejmirtes]

Summary

Enhanced the changelog generator to properly credit multiple contributors when a pull request has been reviewed by multiple people, particularly when the PR author is a bot account.

Key Changes

• Added support for fetching and processing pull request reviews via the GitHub API
• Changed from tracking a single contributor ($thanks) to tracking multiple contributors ($thanksNames)
• Implemented logic to extract reviewer names from PR reviews when the PR author is phpstan-bot
• Added proper formatting for multiple contributors in the changelog output:
  • Single contributor: "thanks @name!"
  • Multiple contributors: "thanks @name1, @name2 and @name3!"
• Filters out bot accounts (phpstan-bot) and the primary maintainer (ondrejmirtes) from the credits
• Ensures unique contributor names are listed

Implementation Details

• Added PullRequest API client import to access review data
• Added utility function imports: array_key_exists, array_slice, array_unique, array_values
• Reviews are fetched only when the PR author is phpstan-bot, optimizing API calls
• Contributor names are deduplicated and sorted before formatting
• Maintains backward compatibility with existing changelog format for single or no contributors

https://claude.ai/code/session_01AAuDLXqrwvhNzwseRW7Wko