feat(bluetooth): Add new settings_reset shield.

* Easy to build board/image that will clear
  saved profile/bond information for a fresh
  start for keyboards.

.github/workflows/build.yml

@@ -17,6 +17,7 @@ jobs:
           - lily58_left
           - lily58_right
           - romac
+          - settings_reset
         include:
           - board: proton_c
             shield: clueboard_california

app/boards/shields/settings_reset/Kconfig.defconfig

@@ -0,0 +1,10 @@
+# Copyright (c) 2020 The ZMK Contributors
+# SPDX-License-Identifier: MIT
+
+if SHIELD_SETTINGS_RESET
+
+config ZMK_KEYBOARD_NAME
+	default "SETTINGS RESET"
+
+endif
+

app/boards/shields/settings_reset/Kconfig.shield

@@ -0,0 +1,5 @@
+# Copyright (c) 2020 The ZMK Contributors
+# SPDX-License-Identifier: MIT
+
+config SHIELD_SETTINGS_RESET
+	def_bool $(shields_list_contains,settings_reset)

app/boards/shields/settings_reset/settings_reset.conf

@@ -0,0 +1 @@
+CONFIG_ZMK_BLE_CLEAR_BONDS_ON_START=y

app/boards/shields/settings_reset/settings_reset.keymap

@@ -0,0 +1,22 @@
+/*
+ * Copyright (c) 2020 The ZMK Contributors
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+#include <behaviors.dtsi>
+#include <dt-bindings/zmk/keys.h>
+
+/ {
+    keymap {
+        compatible = "zmk,keymap";
+
+        default_layer {
+            bindings = <
+    &reset
+            >;
+        };
+    };
+};
+
+

app/boards/shields/settings_reset/settings_reset.overlay

@@ -0,0 +1,24 @@
+/*
+ * Copyright (c) 2020 The ZMK Contributors
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+#include <dt-bindings/zmk/matrix-transform.h>
+
+/ {
+	chosen {
+		zmk,kscan = &kscan0;
+	};
+
+	kscan0: kscan {
+		compatible = "zmk,kscan-gpio-direct";
+		label = "KSCAN";
+
+		input-gpios
+			= <&pro_micro_d 4 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>
+			;
+	};
+
+};
+