[Keyboard] Add 2key2crawl (#6727)

* adding working 2key2crawl

Adding working 2key2crawl files
edited files in accordance with original PR comments

* Changes

Changes and updates

* Update readme.md

* Update config.h

removed IS_COMMAND block that was missed in previous commit

* Changes to vol/keymap.c

Removed unneccesary function

keyboards/2key2crawl/rules.mk

@@ -0,0 +1,29 @@
+# MCU name
+MCU = atmega32u2
+
+
+# Bootloader selection
+#   Teensy       halfkay
+#   Pro Micro    caterina
+#   Atmel DFU    atmel-dfu
+#   LUFA DFU     lufa-dfu
+#   QMK DFU      qmk-dfu
+#   atmega32a    bootloadHID
+BOOTLOADER = atmel-dfu
+
+
+
+# Build Options
+#   comment out to disable the options.
+#
+BOOTMAGIC_ENABLE = lite	# Virtual DIP switch configuration(+1000)
+MOUSEKEY_ENABLE = no	# Mouse keys(+4700)
+EXTRAKEY_ENABLE = no	# Audio control and System control(+450)
+CONSOLE_ENABLE = yes	# Console for debug(+400)
+COMMAND_ENABLE = no    # Commands for debug and configuration
+SLEEP_LED_ENABLE = no  # Breathing sleep LED during USB suspend
+NKRO_ENABLE = no		# USB Nkey Rollover - if this doesn't work, see here: https://github.com/tmk/tmk_keyboard/wiki/FAQ#nkro-doesnt-work
+BACKLIGHT_ENABLE = no  # [Crawlpad] Custom backlighting code is used, so this should not be enabled
+AUDIO_ENABLE = no # [Crawlpad] This can be enabled if a speaker is connected to the expansion port. Not compatible with RGBLIGHT below
+RGBLIGHT_ENABLE = no # [Crawlpad] This can be enabled if a ws2812 strip is connected to the expansion port.
+ENCODER_ENABLE = yes # [2Key2crawl] Make the knobs turn