Add comprehensive release notes review capability for Perseus repository

[Copilot]

Overview

This PR adds a comprehensive toolset for reviewing, analyzing, and searching release notes across the Perseus monorepo. The new capability enables developers, project managers, and stakeholders to efficiently explore the rich history of changes across all Perseus packages.

Problem Addressed

Previously, reviewing release notes required manually checking individual CHANGELOG.md files across 12+ packages, making it difficult to:

• Track changes across the entire monorepo
• Search for specific features or bug fixes
• Generate summaries for stakeholders
• Understand development trends and contributor activity
• Plan upgrades and assess impact of changes

Solution

Created a multi-faceted release notes review system with:

🔧 Core Tool (utils/release-notes-reviewer.js)

• Command-line interface with intuitive commands
• Advanced parsing of changesets-formatted CHANGELOG.md files
• Cross-package search with keyword filtering
• Release summaries with statistics and contributor information
• Package-specific analysis for focused reviews

🌐 Web Interface (utils/release-notes-viewer.html)

• Browser-based UI for non-technical users
• Interactive controls with dropdowns and search fields
• Responsive design that works on desktop and mobile
• Visual formatting with syntax highlighting and clean layout

📚 Documentation (utils/README.md)

• Comprehensive guide with usage examples
• Integration options for CI/CD and documentation generation
• Troubleshooting section for common issues
• Advanced features documentation

🎬 Demo (utils/demo.sh)

• Interactive demonstration of all capabilities
• Real examples using actual Perseus release data
• Quick start for new users

Key Features

Multi-Package Support: Analyzes all Perseus packages (perseus, perseus-core, perseus-editor, math-input, etc.)

Powerful Search: Find changes by keyword across 1000+ releases

# Find all radio widget improvements
node utils/release-notes-reviewer.js search "radio"

# Search for accessibility enhancements
node utils/release-notes-reviewer.js search "accessibility"

Release Analytics: Generate summaries with change counts and contributor metrics

# Get recent activity overview
node utils/release-notes-reviewer.js recent 10

Package-Specific Analysis: Focus on individual packages

# Review latest perseus-core changes
node utils/release-notes-reviewer.js package perseus-core 5

Example Usage

The tool immediately provides value for common workflows:

For Developers: Quickly assess upgrade impact and find relevant changes
For Project Managers: Generate release summaries and track development velocity
For QA Teams: Identify areas needing testing focus after releases
For Documentation: Create targeted change logs for specific features

Implementation Details

• Robust Parsing: Handles changesets format with Major/Minor/Patch categorization
• Metadata Extraction: Captures PR numbers, commit hashes, and author information
• Clean Output: Human-readable formatting with structured data
• Error Handling: Graceful failure modes and helpful error messages
• Performance: Efficient processing of large changelog files

Testing

Verified functionality with:

• All 12 Perseus packages and their changelogs
• Search across 1000+ historical changes
• Summary generation for recent releases
• Cross-package dependency tracking
• Real-world usage scenarios

The tool is production-ready and can immediately help teams understand Perseus development history and plan future work.

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