feature(shields): Add nice!view

* Use two shield system, nice_view, and nice_view_adapter
* Build system fixes for interconnect use.

app/boards/shields/nice_view/Kconfig.defconfig

@@ -0,0 +1,22 @@
+# Copyright (c) 2022 The ZMK Contributors
+# SPDX-License-Identifier: MIT
+
+if SHIELD_NICE_VIEW
+
+config ZMK_DISPLAY
+	select LVGL_FONT_MONTSERRAT_26
+
+if ZMK_DISPLAY
+
+config SPI
+	default y
+
+config LS0XX
+	default y
+
+config ZMK_WIDGET_WPM_STATUS
+	default y if !ZMK_SPLIT || ZMK_SPLIT_ROLE_CENTRAL
+
+endif # ZMK_DISPLAY
+
+endif