Make LocalBox Stateful

[xingyaoww]

What problem or use case are you trying to solve?

Right now, if you do first .execute an cd dir with LocalBox, then in the new round execute pwd, you will find you are still stay in the same work directory. Hence we need to make LocalBox stateful.

Describe the UX of the solution you'd like

You will get a similar stateful experience of SSHBox when running LocalBox, as the box will act like a interactive bash terminal.

Do you have thoughts on the technical implementation?

• Similar to pxssh, could based on pexpect, but it could be buggy in terms of prompt parsing.

Describe alternatives you've considered

Additional context

Required to get CodeActAgent working in Github action (#1290)