[Feature]: Design OS Compatibility Layer

[LINxiansheng]

Use Case

This subtask involves creating an operating system abstraction layer to handle platform-specific differences, similar to MySQL's approach.
Describe the solution you'd like

Design cross-platform abstraction interfaces for file I/O, threading, and memory management
Implement platform-specific implementations for macOS, Linux, and Windows
Create unified APIs for system calls, network operations, and process management
Abstract filesystem operations, path handling, and directory management
Standardize error handling and logging across different operating systems
Implement conditional compilation directives for platform-specific code paths
Ensure consistent behavior across platforms while leveraging OS-specific optimizations