feat(nydusify): add zero-disk streaming image transfer

[daiyongxuan]

Implement a new streaming copy mechanism for image transfer that enables direct source-to-target streaming without using intermediate disk storage.

Key features:

• Add StreamCopy for concurrent pull/push operations
• Introduce streamTransferManager for orchestrating streaming workflows
• Support chunked transfer with progress tracking
• Add HTTP/HTTPS fallback with automatic retries
• Support concurrent layer processing with configurable concurrency
• Retain compatibility with traditional transfer mode

Performance improvements:

• Eliminate need for intermediate disk storage
• Lower memory footprint via streaming buffers
• Enable concurrent image layer processing
• Add progress logging for large transfers

Implementation details:

• Introduce enableStreamTransfer configuration option
• Add httpModeManager for connection switching logic
• Optimize for both small and large file transfers
• Add robust error handling and retry logic
• Integrate with existing provider/resolver framework

This significantly improves performance for large image transfers by avoiding disk I/O bottlenecks.