feat: add hosted mcp tool support

[yusuf-eren]

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[dkundel-openai]

Thank you for contributing this! Since we have an approval flow for local function tool calls already, can you make this work with result.interruptions? https://openai.github.io/openai-agents-js/guides/human-in-the-loop/

This will likely require:

1. Changing the logic in runImplementation.ts to detect if a hosted MCP tool has requested approval and trigger an interruption with an approval item
2. Change the approve and reject functions to create the respective items for an approval.
3. Make sure that in run the run continues appropriately.

Adding @seratch here who had been looking into this as well.

[dkundel-openai]

I don't think I understand how this is currently being used