feat: Implement process.report.getReport() on Windows

This PR implements the Node.js-compatible process.report.getReport() API on Windows, which was previously returning a "Not implemented" message.

## Changes

### Implementation
- Implemented full Windows support for process.report.getReport()
- Uses libuv APIs (uv_cpu_info, uv_interface_addresses) for cross-platform consistency
- Refactored to share common code between Windows and POSIX platforms
- Returns diagnostic information matching Node.js structure

### Key Features
- CPU information: All processors with model, speed, and usage times
- Network interfaces: Complete with MAC addresses, IPs, and netmasks
- Memory statistics: RSS, page faults, system memory info
- Process information: PID, CWD, command line, OS details
- JavaScript heap and stack information
- Loaded DLLs in sharedObjects array

### Testing
- Added comprehensive test suite with 10 tests covering all report sections
- Tests validate structure, data types, and field presence
- All tests passing on Windows

## Compatibility
- Matches Node.js report structure on Windows
- Correctly omits userLimits and uvthreadResourceUsage (not present in Node.js on Windows)
- Includes Windows-specific libUrl in release object

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

Author: zackradisic