Create monitor-session.sh script

[yossiovadia]

Task

Create the background monitoring script that watches a tmux session for approval prompts.

Implementation

• Monitor tmux pane output every 2 seconds
• Detect approval prompt patterns (Allow this tool call, y/n/always, etc.)
• Write alert notifications to /tmp/claude-monitor-{session}.alert
• Support reminder system (alert again every 5 minutes)
• Clean exit when session ends

Acceptance Criteria

• Script runs in background without issues
• Detects approval prompts correctly
• Creates alert files with proper JSON format
• Sends reminders at configured intervals
• Cleans up on session end

Related

Part of #8