FCR: Open source command runner for network devices

Introduced and open-sourced FBNet Command Runner (FCR), a service with a Thrift interface for running commands on network devices. FCR addresses challenges in automating CLI management across multiple vendors and a large number of devices by abstracting vendor-specific details, maintaining a device database for efficient attribute retrieval, and providing scalable load balancing. It enables parallel command execution on thousands of devices, simplifying monitoring, provisioning, and deployment.