[Keyboard] Add waffling60 Rev D ISO Hotswap (#18372)

Co-authored-by: 4pplet <4pplet@protonmail.com>
Co-authored-by: 4pplet <stefan.ess@gmail.com>

keyboards/4pplet/waffling60/rev_d_iso/rules.mk

@@ -0,0 +1,24 @@
+# MCU name
+MCU = STM32F072
+
+# Bootloader selection
+BOOTLOADER = stm32-dfu
+
+# Build Options
+#   change yes to no to disable
+#
+BOOTMAGIC_ENABLE = yes      # Enable Bootmagic Lite
+MOUSEKEY_ENABLE = no        # 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
+
+# Wildcard to allow APM32 MCU
+DFU_SUFFIX_ARGS = -p FFFF -v FFFF
+
+# Enter lower-power sleep mode when on the ChibiOS idle thread
+OPT_DEFS += -DCORTEX_ENABLE_WFI_IDLE=TRUE