support native machine operation mode

[chunhualiao]

the current system seems to rely on two machines: a virtual machine and a host machine using virtual desktop connecting to the virtual machine.

Some users may want to have your system installed on a single machine and directly operate on the machine, without going through a virtual desktop .

[bin123apple]

We currently run the agent inside a virtual machine to ensure that

1. any potentially irreversible damage caused by the agent stays isolated from the host system, and
2. in the next phase, reinforcement-learning training can collect data in parallel across multiple VMs.

Let the agent directly connects to the host machine is definitely useful in some cases, later we can setup a new branch to hold that feature.