snippets/pup/sensor_color: add ambient sample

ambient color sensor is unique to this sensor

snippets/pup/sensor_color/color_ambient.py

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+from pybricks.pupdevices import ColorSensor
+from pybricks.parameters import Port
+from pybricks.tools import wait
+
+# Initialize the sensor.
+sensor = ColorSensor(Port.A)
+
+# Repeat forever.
+while True:
+
+    # Get the ambient color values. Instead of scanning the color of a surface,
+    # this lets you scan the color of light sources like lamps or screens.
+    h, s, v = sensor.hsv(surface=False)
+    color = sensor.color(surface=False)
+
+    # Get the ambient light intensity.
+    ambient = sensor.ambient()
+
+    # Print the measurements.
+    print("Hue:", h, "Sat:", s, "Val:", v, "Col:", color, "Amb:", ambient)
+
+    # Point the sensor at a computer screen or colored light. Watch the color.
+    # Also, cover the sensor with your hands and watch the ambient value.
+
+    # Wait so we can read the printed line
+    wait(100)