Added key code spammer test payload

payloads/library/general/key-code-spammer/payload.txt

@@ -0,0 +1,14 @@
+# Key Code Spammer
+# For testing and giggles
+# Hak5Darren
+#
+LED SETUP
+ATTACKMODE HID
+LED ATTACK
+i=0
+while [ $i  -lt 256 ]
+do
+	x=$(printf "%02X\n"  $i)
+	QUACK KEYCODE 00,00,$x
+	i=$(expr $i + 1)
+done

payloads/library/general/key-code-spammer/readme.md

@@ -0,0 +1,15 @@
+# Key Code Spammer
+
+* Author: Hak5Darren
+
+## Description
+
+Runs through all possible HID key codes. Add your own debug output.
+See https://www.usb.org/sites/default/files/documents/hut1_12v2.pdf
+
+## STATUS
+
+| LED               | Status                                 |
+| ----------------- | -------------------------------------- |
+| SETUP             | Setting attack mode                    |
+| ATACK             | Injecting keystrokes                   |