Add RP2040 SCRAMBLE v2 (#19489)

keyboards/nullbitsco/scramble/rules.mk

@@ -1,19 +1,4 @@
-# MCU name
-MCU = atmega328p
+# NOTE: This file is shared and only exists to set the default build
+# The real build rules are set in the v1/v2 directories
 
-# Bootloader selection
-BOOTLOADER = usbasploader
-
-# Build Options
-#   change yes to no to disable
-#
-BOOTMAGIC_ENABLE = no       # Enable Bootmagic Lite
-MOUSEKEY_ENABLE = yes       # Mouse keys
-EXTRAKEY_ENABLE = yes       # Audio control and System control
-CONSOLE_ENABLE = no         # Console for debug
-COMMAND_ENABLE = no         # Commands for debug and configuration
-NKRO_ENABLE = no            # Enable N-Key Rollover
-BACKLIGHT_ENABLE = no       # Enable keyboard backlight functionality
-RGBLIGHT_ENABLE = no        # Enable keyboard RGB underglow
-AUDIO_ENABLE = no           # Audio output
-ENCODER_ENABLE = yes        # Use rotary encoder
+DEFAULT_FOLDER = nullbitsco/scramble/v2