Keychron q3 (#16912)

Co-authored-by: Joel Challis <git@zvecr.com>
Co-authored-by: Drashna Jaelre <drashna@live.com>
Co-authored-by: Ryan <fauxpark@gmail.com>
Co-authored-by: Nick Brassel <nick@tzarc.org>
Co-authored-by: Cesar Rojas <cesar.fieoner@gmail.com>
Co-authored-by: lokher <lokher@gmail.com>
Co-authored-by: Adam Karim <adam@akarsoft.com>
Co-authored-by: bootstrapper <ido.samuelson@gmail.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

keyboards/keychron/q3/ansi_encoder/rules.mk

@@ -0,0 +1,33 @@
+# MCU name
+MCU = STM32L432
+
+# Bootloader selection
+BOOTLOADER = stm32-dfu
+
+# Build Options
+#   change yes to no to disable
+#
+BOOTMAGIC_ENABLE = yes      # 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 = yes           # Enable USB 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        # Enable Encoder
+DIP_SWITCH_ENABLE = yes
+RGB_MATRIX_ENABLE = yes
+RGB_MATRIX_DRIVER = CKLED2001
+LTO_ENABLE = yes
+EEPROM_DRIVER = wear_leveling
+WEAR_LEVELING_DRIVER = embedded_flash
+
+# Enter lower-power sleep mode when on the ChibiOS idle thread
+OPT_DEFS += -DCORTEX_ENABLE_WFI_IDLE=TRUE
+
+# custom matrix setup
+CUSTOM_MATRIX = lite
+
+SRC += matrix.c