File Copy Job with Strategy Pattern

Description

A flexible FileCopyJob will be implemented to handle all copy and move operations. It uses a strategy pattern to select the optimal file transfer method (e.g., local move, cross-volume stream, remote transfer) based on the source and destination SdPath.

Implementation Notes

• The FileCopyJob and CopyOptions will be defined in src/operations/files/copy/job.rs.
• The CopyStrategyRouter in src/operations/files/copy/routing.rs selects the appropriate strategy.
• Implement strategies include LocalMoveStrategy, LocalStreamCopyStrategy, and RemoteTransferStrategy in src/operations/files/copy/strategy.rs.
• The job provides detailed, byte-level progress updates.

Acceptance Criteria

• The job can copy files and directories locally.
• The job correctly selects an atomic rename for same-volume moves.
• The job can orchestrate a cross-device transfer between two peers.
• The job correctly handles delete_after_copy for move operations.