acp: Support launching custom agent servers (#36805)

It's enough to add this to your settings:

```json
{
    "agent_servers": {
        "Name Of Your Agent": {
            "command": "/path/to/custom/agent",
            "args": ["arguments", "that", "you", "want"],
        }
    }
}
```

Release Notes:

- N/A
61bc1cc441Antonio Scandurra committed on 8/23/2025, 2:30:54 PM· committed by GitHubparent70575d1
15 files changedLine totals unavailable