add and update examples

examples/effects.py

@@ -0,0 +1,22 @@
+from pydualsense import *
+
+# get dualsense instance
+dualsense = pydualsense()
+dualsense.init()
+
+print('Trigger Effect demo started')
+
+dualsense.setLeftMotor(255)
+dualsense.setRightMotor(100)
+dualsense.setLeftTriggerMode(TriggerModes.Rigid)
+dualsense.setLeftTriggerForce(1, 255)
+
+dualsense.setRightTriggerMode(TriggerModes.Pulse_A)
+dualsense.setRightTriggerForce(0, 200)
+dualsense.setRightTriggerForce(1, 255)
+dualsense.setRightTriggerForce(2, 175)
+
+import time; time.sleep(3)
+
+# terminate the thread for message and close the device
+dualsense.close()