feature: add sandbox integrations

[eyurtsev]

Add protocol extension to support shell execution

Daytona

from daytona import CreateSandboxFromSnapshotParams, Daytona, DaytonaConfig
from daytona import Daytona
from deepagents_cli.integrations.daytona import DaytonaBackend

client = Daytona()

daytona_sandbox = client.create(
    params=CreateSandboxFromSnapshotParams(
        auto_stop_interval="15",
        auto_delete_interval="15",
    )
)

backend = DaytonaBackend(daytona_sandbox)

Runloop

import os

from runloop_api_client import Runloop

client = Runloop(
    bearer_token=os.environ.get("RUNLOOP_API_KEY"),  # This is the default and can be omitted
)

devbox_view = client.devboxes.create_and_await_running()
print(devbox_view.id)

backend = RunloopBackend(devbox_id=devbox_view.id, client=client)

[vtrivedy]

general design decision of "everything is execute()" way of fs ops + bash in sandbox? vs Provider specific file APIs (ex: from modal)

app = modal.App.lookup("sandbox-fs-demo", create_if_missing=True)
sb = modal.Sandbox.create(app=app)

with sb.open("test.txt", "w") as f:
f.write("Hello World\n")

f = sb.open("test.txt", "rb")
print(f.read())
f.close()

[vtrivedy]

changing dir here doesn't seem right, shouldn't affect state of cwd

[vtrivedy]

not sure we want to string match for this? seems brittle