Fix Python session.send docs examples

[stephentoub]

Several Python docs examples showed the Node/TypeScript session.send({ prompt: ... }) shape even though the Python SDK expects the prompt as a positional string. Following those examples could send a JSON object as the prompt and surface a CLI session.error.

This updates the Python BYOK and steering/queueing examples to use session.send("...") with mode= passed as a keyword argument where needed. TypeScript examples are left unchanged because the object form is correct for that SDK.

Fixes #1127

[Copilot]

Pull request overview

This PR corrects Python documentation examples to match the Python SDK’s CopilotSession.send(prompt: str, *, mode=...) API shape, avoiding cases where users copy examples that accidentally send a JSON object as the prompt and trigger CLI session.error failures (per #1127).

Changes:

• Update Python BYOK example to call await session.send("...") instead of passing { "prompt": ... }.
• Update Python steering/queueing examples to use positional prompt strings and mode="immediate" / mode="enqueue" keyword arguments.
• Leave Node.js/TypeScript examples unchanged (object form is correct for that SDK).

Show a summary per file

File	Description
docs/features/steering-and-queueing.md	Fix Python steering/queueing snippets to use session.send("...") with mode= keyword arg.
docs/auth/byok.md	Fix Python BYOK snippet to pass the prompt as a positional string to session.send().

Copilot's findings

• Files reviewed: 2/2 changed files
• Comments generated: 0