Add OpenAI Agents SDK sandbox docs

[mishushakov]

No description provided.

[mintlify]

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Project	Status	Preview	Updated (UTC)
e2b	🟢 Ready	View Preview	Apr 15, 2026, 5:25 PM

[cursor]

PR Summary

Low Risk
Documentation-only change that adds a new page and navigation entry; low risk beyond potential broken links/assets or code sample drift.

Overview
Adds a new OpenAI Agents SDK documentation page describing how to run Agents SDK SandboxAgent workflows inside E2B, including setup, a basic run/shutdown flow, multi-sandbox Vite app iteration with previews, MCP-enabled research, and parallel sandbox worker patterns.

Updates docs.json to surface the new page under Agents in sandbox, and adds a dedicated openai-agents-sdk SVG icon for the doc page.

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