adding basic IR CP example

Adding basic IR transmit example for the STEMMA IR LED emitter product guide.

STEMMA_IR_LED_Emitter/code.py

@@ -0,0 +1,28 @@
+# SPDX-FileCopyrightText: 2022 Liz Clark for Adafruit Industries
+# SPDX-License-Identifier: MIT
+# Based on irremote_transmit.py for CPX by ladyada
+
+import time
+import pulseio
+import board
+import adafruit_irremote
+
+# Create a 'PulseOut' to send infrared signals on the IR transmitter @ 38KHz
+pulseout = pulseio.PulseOut(board.D5, frequency=38000, duty_cycle=2**15)
+# Create an encoder that will take numbers and turn them into NEC IR pulses
+emitter = adafruit_irremote.GenericTransmit(
+    header=[9500, 4500], one=[550, 550], zero=[550, 1700], trail=0
+)
+
+#  count variable
+count = 0
+
+while True:
+	#  send IR pulse
+    emitter.transmit(pulseout, [255, 2, 255, 0])
+	#  increase count
+    count += 1
+	#  print to REPL
+    print("IR signal sent %d times!" % count)
+	#  two second delay
+    time.sleep(2)