feat(boards): Add nice!60 board

app/boards/arm/nice60/Kconfig.defconfig

@@ -0,0 +1,31 @@
+# Copyright (c) 2021 Nick Winans
+# SPDX-License-Identifier: MIT
+
+if BOARD_NICE60
+
+config ZMK_KEYBOARD_NAME
+	default "nice!60"
+
+if USB
+
+config USB_NRFX
+	default y
+
+config USB_DEVICE_STACK
+	default y
+
+endif # USB
+
+config BT_CTLR
+	default BT
+
+config ZMK_BLE
+	default y
+
+config ZMK_USB
+	default y
+
+config ZMK_BATTERY_VOLTAGE_DIVIDER
+	default y
+
+endif # BOARD_NICE60