POC: user-defined environments

[aluzzardi]

Just a POC to play around "user defined environments".

The idea is:

• Every cu installation gets a default environment (stateful)
• Agents work on that environment, proposing changes, with the user reviewing/merging
• New sessions automatically resume work in said environment
• In a multi agent scenario, or experimentation scenario, the user could create a different environment and lead the agent there

# this should happen behind the scenes
$ cu create default

$ goose run --debug -s -t "create a hello world application using flask and a stunning blue design" 
─── environment_list | container-use ──────────────────────────
─── environment_open | container-use ──────────────────────────
environment_id: default
...

$  goose run --debug -s -t "start the hello world app" 
─── environment_list | container-use ──────────────────────────
I see there's a default environment available. Let me open it and check what's inside.
─── environment_open | container-use ──────────────────────────
environment_id: default
Let me check the contents of the environment to find the hello world application.
─── environment_file_list | container-use ──────────────────────────
Now I'll start the application using Python. Since this is a web application that needs to run continuously, I'll run it in the background:
─── environment_run_cmd | container-use ──────────────────────────
background: true