Adds a Docker-based execution sandbox to enhance the security and resource management of code execution.
This change introduces:
- New execution services for C#, C++, Java, Kotlin, and Python that utilize the sandbox.
- Configuration options for enabling/disabling the sandbox and specifying Docker images for different languages.
- Batch execution support for C++ to improve the efficiency of generating answer files.
- Docker CLI installation in the worker's Dockerfile.
The sandbox provides improved isolation and resource control during code execution, preventing potential security vulnerabilities and resource exhaustion.
