Add MiniMax API support, Apple Container runtime, and stop script

- Add ASSISTANT_NAME and claude-minimax.sh for MiniMax API usage
- Switch container runtime from Docker to Apple Container
- Add CJK character restriction notice to CLAUDE.md files
- Add stop.sh for graceful shutdown

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

stop.sh

@@ -0,0 +1,19 @@
+#!/bin/bash
+set -euo pipefail
+
+cd "$(dirname "${BASH_SOURCE[0]}")"
+
+# Stop launchd service (if loaded)
+if launchctl list | grep -q "com.nanoclaw"; then
+  echo "Stopping via launchctl..."
+  launchctl unload ~/Library/LaunchAgents/com.nanoclaw.plist 2>/dev/null || true
+fi
+
+# Kill direct node process running nanoclaw
+PIDS=$(pgrep -f "node.*dist/index.js" 2>/dev/null || true)
+if [ -n "$PIDS" ]; then
+  echo "Killing node processes: $PIDS"
+  echo "$PIDS" | xargs kill 2>/dev/null || true
+fi
+
+echo "Stopped."