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/nice_view.overlay

@@ -0,0 +1,23 @@
+/*
+ * Copyright (c) 2022 The ZMK Contributors
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+&nice_view_spi {
+	status = "okay";
+	nice_view: ls0xx@0 {
+		compatible = "sharp,ls0xx";
+		label = "DISPLAY";
+		spi-max-frequency = <1000000>;
+		reg = <0>;
+		width = <160>;
+		height = <68>;
+	};
+};
+
+/ {
+	chosen {
+		zephyr,display = &nice_view;
+	};
+};