fix(devboxes): clean up create timeout

[jrvb-rl]

Description

Prevent devboxes created by createAndAwaitRunning from being orphaned when waiting for the running state times out.

Motivation

The create request succeeds before polling begins. If polling times out, the devbox can continue booting without the caller retaining its ID, wasting resources until lifecycle cleanup eventually shuts it down.

Changes

• Shut down the created devbox on polling timeout by default, then rethrow the original timeout.
• Add shutdownOnTimeout: false to return the created devbox instead, including a high-level Devbox wrapper through SDK create helpers.
• Add regression tests for cleanup, opt-out behavior, and SDK option forwarding.

Testing

• Unit tests added
• Integration tests added
• Smoke Tests added/updated
• Tested locally

Validated with targeted Jest tests, yarn lint, and yarn build.

Breaking Changes

None. The timeout is still raised by default; the created devbox is now shut down first.

Checklist

• PR title follows Conventional Commits format (feat: or feat(scope):)
• Documentation updated (if needed)
• Breaking changes documented (if applicable)

[reflex-loop]

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[github-actions]

❌ Object Smoke Tests Failed

Test Results

❌ Some smoke tests failed

Failed Tests:

• �[22m�[1msmoketest: object-oriented gateway config › comprehensive gateway proxying tests › invalid JSON body returns error�[39m�[22m

Please fix the failing tests before checking coverage.

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