Added Omniparser mode for agent & other features

[ddupont808]

Changelog

• Added Omniparser integration for Navi agent (./run-local.sh --som-origin omni & ./run-local.sh --som-origin mixed-omni)
• Added CUDA support when passing --gpu-enabled true to ./run-local.sh
• Added QEMU controller class vm_controller.py to improve env rendering & to add a VM snapshot API
• Disabled windows from entering automatic recovery when quickly launching & shutting down VMs
• Tidied up desktop env & readme

If you've already built the docker image, rebuilding it once is necessary for downloading the Omniparser weights. This should be done by running cd scripts && ./build-container-image.sh --build-base-image true

[ddupont808]

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