refactor: remove remote control, zero-force mode and emergency stop

- Remove RC_ctrl_t and RemoteControlInit from robot_cmd.c
- Delete GIMBAL_ZERO_FORCE, gimbal_mode_e, Robot_Status_e from robot_def.h
- Remove EmergencyHandler and robot_state from robot_cmd.c
- Remove emergency commands from master_machine.h
- Remove remote_control and can_comm from CMakeLists.txt

application/gimbal/gimbal.c

@@ -84,17 +84,8 @@ void GimbalTask()
 {
     SubGetMessage(gimbal_sub, &gimbal_cmd_recv);
 
-    if (gimbal_cmd_recv.gimbal_mode == GIMBAL_ZERO_FORCE)
-    {
-        /* 零力模式: 保持当前IMU角度, 电机不主动出力 */
-        DMMotorSetRef(yaw_motor, gimbal_IMU_data->YawTotalAngle);
-        DMMotorSetRef(pitch_motor, gimbal_IMU_data->Pitch);
-    }
-    else
-    {
-        DMMotorSetRef(yaw_motor, gimbal_cmd_recv.yaw);
-        DMMotorSetRef(pitch_motor, gimbal_cmd_recv.pitch);
-    }
+    DMMotorSetRef(yaw_motor, gimbal_cmd_recv.yaw);
+    DMMotorSetRef(pitch_motor, gimbal_cmd_recv.pitch);
 
     gimbal_feedback_data.gimbal_imu_data = gimbal_IMU_data;
     PubPushMessage(gimbal_pub, (void *)&gimbal_feedback_data);