Adds htop bot command with live-updating Matrix message showing system
load and per-agent CPU/memory usage. Supports timeout override and
htop stop. Resolved conflict with git command in commands.rs registry.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Moves status, ambient, and help commands into a unified command registry
in commands.rs. Help output now automatically lists all registered
commands. Resolved merge conflict with 1_backlog rename.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>