[Keyboard] Nebula12 keyboard (#9397)

Co-authored-by: Ryan <fauxpark@gmail.com>
Co-authored-by: Drashna Jaelre <drashna@live.com>

keyboards/nebula12/rules.mk

@@ -0,0 +1,34 @@
+# MCU name
+MCU = STM32F072
+
+BOARD = ST_STM32F072B_DISCOVERY
+
+# Do not put the microcontroller into power saving mode
+# when we get USB suspend event. We want it to keep updating
+# backlight effects.
+OPT_DEFS += -DNO_SUSPEND_POWER_DOWN
+
+# Build Options
+#   comment out to disable the options.
+#
+BACKLIGHT_ENABLE = no              # Enable keyboard backlight functionality
+BOOTMAGIC_ENABLE = lite            # Virtual DIP switch configuration
+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
+SLEEP_LED_ENABLE = no              # Breathing sleep LED during USB suspend
+NKRO_ENABLE = yes                  # USB Nkey Rollover
+AUDIO_ENABLE = no                  # Audio output on port C6
+NO_USB_STARTUP_CHECK = no          # Disable initialization only when usb is plugged in
+RGBLIGHT_ENABLE = yes              # Underglow RGB
+WS2812_DRIVER = spi                # Underglow RGB Driver
+
+CIE1931_CURVE = yes
+
+# project specific files
+SRC +=  keyboards/wilba_tech/wt_main.c \
+        keyboards/wilba_tech/wt_rgb_backlight.c \
+        drivers/issi/is31fl3731.c \
+        quantum/color.c
+QUANTUM_LIB_SRC += drivers/chibios/i2c_master.c