feat(board): add puchi_ble_v1 to boards

* feat(board): Add Puchi-BLE v1 board

app/boards/arm/puchi_ble/pinmux.c

@@ -0,0 +1,29 @@
+/*
+ * Copyright (c) 2022 The ZMK Contributors
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+#include <kernel.h>
+#include <device.h>
+#include <init.h>
+#include <drivers/gpio.h>
+#include <sys/sys_io.h>
+#include <devicetree.h>
+
+static int pinmux_puchi_ble_init(const struct device *port) {
+    ARG_UNUSED(port);
+
+#if CONFIG_BOARD_PUCHI_BLE_v1
+    const struct device *p0 = device_get_binding("GPIO_0");
+#if CONFIG_BOARD_PUCHI_BLE_CHARGER
+    gpio_pin_configure(p0, 5, GPIO_OUTPUT);
+    gpio_pin_set(p0, 5, 0);
+#else
+    gpio_pin_configure(p0, 5, GPIO_INPUT);
+#endif
+#endif
+    return 0;
+}
+
+SYS_INIT(pinmux_puchi_ble_init, APPLICATION, CONFIG_APPLICATION_INIT_PRIORITY);