Refactor infrastructure scripts and add mock hardware support

Changes:
- Refactor project scripts for better dev/prod workflow separation
- Add mock_hardware.py for local development without real hardware
- Add Makefile for common commands
- Add .env.example for environment variable reference
- Split scripts into dev-backend.sh, dev-frontend.sh, prod-backend.sh
- Add stop.sh for clean shutdown

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

agv_app/config.py

@@ -10,6 +10,11 @@ BASE_DIR = os.path.dirname(os.path.abspath(__file__))
 AGV_HOST = "192.168.60.80"
 ARM_HOST = "192.168.60.120"
 
+# ========== 开发模式 ==========
+# 设置为 True 时使用 Mock 硬件实现（无需真实硬件）
+# 通过环境变量 MOCK_HARDWARE=1 启用
+MOCK_HARDWARE = os.getenv("MOCK_HARDWARE", "0") == "1"
+
 # ========== AGV 参数 ==========
 AGV_CONFIG = {
     "device": "/dev/agvpro_controller",