instructions for devin cli

[matthewlouisbrockman]

adds cli, js, and python instructions for devin cli;

main question right now: leave in the js/python examples with the hacked in pty, or leave them out until we get first class support for oauth login options into the SDK

removing the js/python for now, leaving just cli

[mintlify]

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Project	Status	Preview	Updated (UTC)
e2b	🟢 Ready	View Preview	Apr 30, 2026, 6:37 AM

[cursor]

PR Summary

Low Risk
Documentation-only changes that add a new page and navigation entry; risk is limited to broken links/assets or inaccurate usage guidance.

Overview
Adds a new docs page for running Devin for Terminal inside an E2B sandbox, including PTY-based install/login steps and non-interactive usage examples.

Updates docs.json navigation to include docs/agents/devin under Agents in sandbox and introduces a new images/icons/devin.svg icon used by the page.

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