[Keyboard] Add zvecr/zv48 (#9227)

* Add zv48 keyboard

* tidy up rules

* correct product name

keyboards/zvecr/zv48/rules.mk

@@ -0,0 +1,29 @@
+# Build Options
+#   change yes to no to disable
+#
+BOOTMAGIC_ENABLE = lite     # Virtual DIP switch configuration
+KEYBOARD_SHARED_EP = yes    # Free up some extra endpoints - needed if console+mouse+extra
+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
+# Do not enable SLEEP_LED_ENABLE. it uses the same timer as BACKLIGHT_ENABLE
+SLEEP_LED_ENABLE = no       # Breathing sleep LED during USB suspend
+# if this doesn't work, see here: https://github.com/tmk/tmk_keyboard/wiki/FAQ#nkro-doesnt-work
+NKRO_ENABLE = yes           # USB Nkey Rollover
+BACKLIGHT_ENABLE = no       # Enable keyboard backlight functionality
+RGBLIGHT_ENABLE = yes       # Enable keyboard RGB underglow
+ENCODER_ENABLE = yes        # Enable rotary encoder support
+MIDI_ENABLE = no            # MIDI support
+BLUETOOTH_ENABLE = no       # Enable Bluetooth with the Adafruit EZ-Key HID
+AUDIO_ENABLE = no           # Audio output
+FAUXCLICKY_ENABLE = no      # Use buzzer to emulate clicky switches
+
+SPLIT_KEYBOARD = yes
+SERIAL_DRIVER = usart
+WS2812_DRIVER = pwm
+OPT_DEFS += -DSTM32_DMA_REQUIRED=TRUE
+
+DEFAULT_FOLDER = zvecr/zv48/f401
+
+LAYOUTS = ortho_4x12