Bash tool instructions now point Claude to Monitor for waiting and polling

The Bash tool lets Claude run shell commands. Its description, the instructions Claude reads about how to use it, was rewritten in this release.

• Removed: advice to poll an outside process with a check command rather than sleeping first, and to keep any sleep short.
• Added: use the Monitor tool to stream events from a background process, where each line of output becomes a notification.
• Added: for a single "wait until done", run Bash in the background instead.
• Added: long sleep commands at the start are blocked, and to poll until something is true, use Monitor with an until-loop such as until <check>; do sleep 2; done.