feat(examples): support conversation_title in title.sh and update docs

[toyo30]

Description

Extends the window title example script (examples/title/title.sh) and documentation to extract and display the active conversation_title (or conversation_name) in the terminal window title when set (e.g. via /rename or /title).

Motivation

When working with named sessions, having the current conversation name reflected in the terminal window title (e.g. 🏃 working | homepage (auth-refactor)) makes multi-session navigation much clearer and integrates directly with the CLI conversation lifecycle.

Changes Made

• Updated examples/title/title.sh to extract conversation_title / conversation_name from stdin JSON payload and format output as [Emoji] [State] | [Workspace] ([ConversationTitle]) when present.
• Updated examples/title/README.md to document the new field and title format.
• Relates to [Bug / UX]: '/rename' fails with 'no active conversation' on fresh launch before first prompt #989.

Testing

• Tested title.sh with payload containing conversation_title:

  echo '{"agent_state": "working", "workspace": {"current_dir": "/Users/user/project"}, "conversation_title": "my-task"}' | bash examples/title/title.sh
  # Output: 🏃 working | project (my-task)

• Tested title.sh with payload without conversation_title:

  echo '{"agent_state": "idle", "workspace": {"current_dir": "/Users/user/project"}}' | bash examples/title/title.sh
  # Output: 😴 idle | project

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