Add license and attribution for used code.

robot/raspbot_v2_interface/Raspbot_Lib/NOTICE

@@ -0,0 +1,11 @@
+This directory contains the Yahboom RASPBOT-V2 hardware interface library.
+
+  Source:    https://www.yahboom.net/study/RASPBOT-V2
+  Copyright: Yahboom Technology Co., Ltd.
+
+The library was taken directly from the resources published by Yahboom for the
+RASPBOT-V2 platform and is included here unmodified to provide I²C access to
+the robot's motors and servos.
+
+No explicit open-source license has been provided by Yahboom for this material.
+All intellectual property rights remain with Yahboom Technology Co., Ltd.

robot/raspbot_v2_interface/Raspbot_Lib/Raspbot_Lib.py

@@ -1,5 +1,12 @@
 #!/usr/bin/env python3
 # coding: utf-8
+#
+# Source: Yahboom RASPBOT-V2 hardware library
+# Origin: https://www.yahboom.net/study/RASPBOT-V2
+# Copyright: Yahboom Technology Co., Ltd.
+# No explicit open-source license provided by the upstream source.
+# Included here unmodified for hardware compatibility.
+#
 import smbus
 import time,random
 import math